uv ink
TRANSCRIPT
1
WELL COME TO
UV INK
2
Contents
bull Introductionbull UV Ink Requirementsbull Why UVbull UV Spectrumbull UV Curing Processbull Components of UV Inksbull Substratesbull Applicationbull Benefitsbull Limitationbull Drying Mechanism
bull Factors influencing UV Curingbull UV Machinery and Equipmentsbull Lampsbull Reflectorsbull Maintenance of Lamps and Reflectorsbull Rollers and Blanketsbull Testing Processbull Corona Requirementsbull Testing Equipmentsbull Storagebull Protective Measuresbull Troubleshooting
3
Without Inks Thoughts would be Colorless
bull Identification
bull Protection
bull Decoration
4
UV Ink Requirementsbull High Colour Strength ndash glossbull Fast curing for high production speedbull Low misting at high printing speedbull Adhesion on various pretreated substratesbull Good flow characteristicsbull Mechanical and Chemical Resistancebull Light Fastness
5
UV Printing Inks
bull Itsrsquo Clean
bull Itsrsquo Fast
bull Itsrsquo Versatile
bull Itsrsquo Tough
6
Spectrum
7
8
What Is UV Curing
bull The conversion of liquid into a solid using Ultra Violet Light to initiate the drying process is known as UV curing system
bull 1st used industrially in 1940 to cure paints and coatings
bull The graphic arts industry embraced UV Technology only in the 70srsquo when 1st UV curable Lithographic inks were formulated
9
bull OligomerMain component of the formulation Provides main coating characteristics
bull MonomersUsed to control viscosity and contributes to shrinkage flexibility cure speed etc Also part of the crosslinking reaction
bull Photoinitiator Absorbs UV light and initiates the polymerization
reactionbull Pigment amp Fillersbull Additive ndash Surfactants DefoamersTackifiers etc
Components of A UV Formulation
10
UV Ink Raw Materials
11
Substrates Used for UV Inks
bull Paperbull Boardbull Plastic Filmbull Metallised Paperbull Aluminium Metal
12
bull Printing Process Application Areas
bull 1 Offset Sheet-fed 1 Over Carton- Boardbull 2 Web-fed Offset 2 For Business forms direct
mail lottery ticketsbull 3 Screen Printing 3 Paper Synthetic Substrate
CD Credit Cardsbull 4 Flexography 4 Paper or Synthetic substrate for labelsbull 5Letterpress 5 Paper or Synthetic substrate for labels
Application of UV Inks
13
Converting amp Printing Applications
14
bull An instantaneous drying process which givesHigher Productivity and Immediate post-processing
bull Dependable Drying Process which Minimizes the risk of Set- Offs amp Gives higher physical amp chemical Resistance with Excellent performance properties and Improved Aesthetics
bull Ecologically Cleaner Drying Process No VOCsrsquo during curing process ( Solvent Free )
bull Versatile Substrates including Heat Sensitive Materials
bull Compact Lamp systems contrast with Large IR or Hot Air drying Ovens ndash Reduced Floor Space Requirements
bull In-line processing capability and minimal manufacturing steps bull Energy Savings
Benefits - UV Process
15
bull High capital equipment costbull High material costbull Life of lampsbull Cleaning chemicalsbull Special rollers amp blanketsbull Plates bakingbull Shelf life and storagebull Personal protection Skin Irritant
Limitations ndash UV Process
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
2
Contents
bull Introductionbull UV Ink Requirementsbull Why UVbull UV Spectrumbull UV Curing Processbull Components of UV Inksbull Substratesbull Applicationbull Benefitsbull Limitationbull Drying Mechanism
bull Factors influencing UV Curingbull UV Machinery and Equipmentsbull Lampsbull Reflectorsbull Maintenance of Lamps and Reflectorsbull Rollers and Blanketsbull Testing Processbull Corona Requirementsbull Testing Equipmentsbull Storagebull Protective Measuresbull Troubleshooting
3
Without Inks Thoughts would be Colorless
bull Identification
bull Protection
bull Decoration
4
UV Ink Requirementsbull High Colour Strength ndash glossbull Fast curing for high production speedbull Low misting at high printing speedbull Adhesion on various pretreated substratesbull Good flow characteristicsbull Mechanical and Chemical Resistancebull Light Fastness
5
UV Printing Inks
bull Itsrsquo Clean
bull Itsrsquo Fast
bull Itsrsquo Versatile
bull Itsrsquo Tough
6
Spectrum
7
8
What Is UV Curing
bull The conversion of liquid into a solid using Ultra Violet Light to initiate the drying process is known as UV curing system
bull 1st used industrially in 1940 to cure paints and coatings
bull The graphic arts industry embraced UV Technology only in the 70srsquo when 1st UV curable Lithographic inks were formulated
9
bull OligomerMain component of the formulation Provides main coating characteristics
bull MonomersUsed to control viscosity and contributes to shrinkage flexibility cure speed etc Also part of the crosslinking reaction
bull Photoinitiator Absorbs UV light and initiates the polymerization
reactionbull Pigment amp Fillersbull Additive ndash Surfactants DefoamersTackifiers etc
Components of A UV Formulation
10
UV Ink Raw Materials
11
Substrates Used for UV Inks
bull Paperbull Boardbull Plastic Filmbull Metallised Paperbull Aluminium Metal
12
bull Printing Process Application Areas
bull 1 Offset Sheet-fed 1 Over Carton- Boardbull 2 Web-fed Offset 2 For Business forms direct
mail lottery ticketsbull 3 Screen Printing 3 Paper Synthetic Substrate
CD Credit Cardsbull 4 Flexography 4 Paper or Synthetic substrate for labelsbull 5Letterpress 5 Paper or Synthetic substrate for labels
Application of UV Inks
13
Converting amp Printing Applications
14
bull An instantaneous drying process which givesHigher Productivity and Immediate post-processing
bull Dependable Drying Process which Minimizes the risk of Set- Offs amp Gives higher physical amp chemical Resistance with Excellent performance properties and Improved Aesthetics
bull Ecologically Cleaner Drying Process No VOCsrsquo during curing process ( Solvent Free )
bull Versatile Substrates including Heat Sensitive Materials
bull Compact Lamp systems contrast with Large IR or Hot Air drying Ovens ndash Reduced Floor Space Requirements
bull In-line processing capability and minimal manufacturing steps bull Energy Savings
Benefits - UV Process
15
bull High capital equipment costbull High material costbull Life of lampsbull Cleaning chemicalsbull Special rollers amp blanketsbull Plates bakingbull Shelf life and storagebull Personal protection Skin Irritant
Limitations ndash UV Process
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
3
Without Inks Thoughts would be Colorless
bull Identification
bull Protection
bull Decoration
4
UV Ink Requirementsbull High Colour Strength ndash glossbull Fast curing for high production speedbull Low misting at high printing speedbull Adhesion on various pretreated substratesbull Good flow characteristicsbull Mechanical and Chemical Resistancebull Light Fastness
5
UV Printing Inks
bull Itsrsquo Clean
bull Itsrsquo Fast
bull Itsrsquo Versatile
bull Itsrsquo Tough
6
Spectrum
7
8
What Is UV Curing
bull The conversion of liquid into a solid using Ultra Violet Light to initiate the drying process is known as UV curing system
bull 1st used industrially in 1940 to cure paints and coatings
bull The graphic arts industry embraced UV Technology only in the 70srsquo when 1st UV curable Lithographic inks were formulated
9
bull OligomerMain component of the formulation Provides main coating characteristics
bull MonomersUsed to control viscosity and contributes to shrinkage flexibility cure speed etc Also part of the crosslinking reaction
bull Photoinitiator Absorbs UV light and initiates the polymerization
reactionbull Pigment amp Fillersbull Additive ndash Surfactants DefoamersTackifiers etc
Components of A UV Formulation
10
UV Ink Raw Materials
11
Substrates Used for UV Inks
bull Paperbull Boardbull Plastic Filmbull Metallised Paperbull Aluminium Metal
12
bull Printing Process Application Areas
bull 1 Offset Sheet-fed 1 Over Carton- Boardbull 2 Web-fed Offset 2 For Business forms direct
mail lottery ticketsbull 3 Screen Printing 3 Paper Synthetic Substrate
CD Credit Cardsbull 4 Flexography 4 Paper or Synthetic substrate for labelsbull 5Letterpress 5 Paper or Synthetic substrate for labels
Application of UV Inks
13
Converting amp Printing Applications
14
bull An instantaneous drying process which givesHigher Productivity and Immediate post-processing
bull Dependable Drying Process which Minimizes the risk of Set- Offs amp Gives higher physical amp chemical Resistance with Excellent performance properties and Improved Aesthetics
bull Ecologically Cleaner Drying Process No VOCsrsquo during curing process ( Solvent Free )
bull Versatile Substrates including Heat Sensitive Materials
bull Compact Lamp systems contrast with Large IR or Hot Air drying Ovens ndash Reduced Floor Space Requirements
bull In-line processing capability and minimal manufacturing steps bull Energy Savings
Benefits - UV Process
15
bull High capital equipment costbull High material costbull Life of lampsbull Cleaning chemicalsbull Special rollers amp blanketsbull Plates bakingbull Shelf life and storagebull Personal protection Skin Irritant
Limitations ndash UV Process
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
4
UV Ink Requirementsbull High Colour Strength ndash glossbull Fast curing for high production speedbull Low misting at high printing speedbull Adhesion on various pretreated substratesbull Good flow characteristicsbull Mechanical and Chemical Resistancebull Light Fastness
5
UV Printing Inks
bull Itsrsquo Clean
bull Itsrsquo Fast
bull Itsrsquo Versatile
bull Itsrsquo Tough
6
Spectrum
7
8
What Is UV Curing
bull The conversion of liquid into a solid using Ultra Violet Light to initiate the drying process is known as UV curing system
bull 1st used industrially in 1940 to cure paints and coatings
bull The graphic arts industry embraced UV Technology only in the 70srsquo when 1st UV curable Lithographic inks were formulated
9
bull OligomerMain component of the formulation Provides main coating characteristics
bull MonomersUsed to control viscosity and contributes to shrinkage flexibility cure speed etc Also part of the crosslinking reaction
bull Photoinitiator Absorbs UV light and initiates the polymerization
reactionbull Pigment amp Fillersbull Additive ndash Surfactants DefoamersTackifiers etc
Components of A UV Formulation
10
UV Ink Raw Materials
11
Substrates Used for UV Inks
bull Paperbull Boardbull Plastic Filmbull Metallised Paperbull Aluminium Metal
12
bull Printing Process Application Areas
bull 1 Offset Sheet-fed 1 Over Carton- Boardbull 2 Web-fed Offset 2 For Business forms direct
mail lottery ticketsbull 3 Screen Printing 3 Paper Synthetic Substrate
CD Credit Cardsbull 4 Flexography 4 Paper or Synthetic substrate for labelsbull 5Letterpress 5 Paper or Synthetic substrate for labels
Application of UV Inks
13
Converting amp Printing Applications
14
bull An instantaneous drying process which givesHigher Productivity and Immediate post-processing
bull Dependable Drying Process which Minimizes the risk of Set- Offs amp Gives higher physical amp chemical Resistance with Excellent performance properties and Improved Aesthetics
bull Ecologically Cleaner Drying Process No VOCsrsquo during curing process ( Solvent Free )
bull Versatile Substrates including Heat Sensitive Materials
bull Compact Lamp systems contrast with Large IR or Hot Air drying Ovens ndash Reduced Floor Space Requirements
bull In-line processing capability and minimal manufacturing steps bull Energy Savings
Benefits - UV Process
15
bull High capital equipment costbull High material costbull Life of lampsbull Cleaning chemicalsbull Special rollers amp blanketsbull Plates bakingbull Shelf life and storagebull Personal protection Skin Irritant
Limitations ndash UV Process
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
5
UV Printing Inks
bull Itsrsquo Clean
bull Itsrsquo Fast
bull Itsrsquo Versatile
bull Itsrsquo Tough
6
Spectrum
7
8
What Is UV Curing
bull The conversion of liquid into a solid using Ultra Violet Light to initiate the drying process is known as UV curing system
bull 1st used industrially in 1940 to cure paints and coatings
bull The graphic arts industry embraced UV Technology only in the 70srsquo when 1st UV curable Lithographic inks were formulated
9
bull OligomerMain component of the formulation Provides main coating characteristics
bull MonomersUsed to control viscosity and contributes to shrinkage flexibility cure speed etc Also part of the crosslinking reaction
bull Photoinitiator Absorbs UV light and initiates the polymerization
reactionbull Pigment amp Fillersbull Additive ndash Surfactants DefoamersTackifiers etc
Components of A UV Formulation
10
UV Ink Raw Materials
11
Substrates Used for UV Inks
bull Paperbull Boardbull Plastic Filmbull Metallised Paperbull Aluminium Metal
12
bull Printing Process Application Areas
bull 1 Offset Sheet-fed 1 Over Carton- Boardbull 2 Web-fed Offset 2 For Business forms direct
mail lottery ticketsbull 3 Screen Printing 3 Paper Synthetic Substrate
CD Credit Cardsbull 4 Flexography 4 Paper or Synthetic substrate for labelsbull 5Letterpress 5 Paper or Synthetic substrate for labels
Application of UV Inks
13
Converting amp Printing Applications
14
bull An instantaneous drying process which givesHigher Productivity and Immediate post-processing
bull Dependable Drying Process which Minimizes the risk of Set- Offs amp Gives higher physical amp chemical Resistance with Excellent performance properties and Improved Aesthetics
bull Ecologically Cleaner Drying Process No VOCsrsquo during curing process ( Solvent Free )
bull Versatile Substrates including Heat Sensitive Materials
bull Compact Lamp systems contrast with Large IR or Hot Air drying Ovens ndash Reduced Floor Space Requirements
bull In-line processing capability and minimal manufacturing steps bull Energy Savings
Benefits - UV Process
15
bull High capital equipment costbull High material costbull Life of lampsbull Cleaning chemicalsbull Special rollers amp blanketsbull Plates bakingbull Shelf life and storagebull Personal protection Skin Irritant
Limitations ndash UV Process
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
6
Spectrum
7
8
What Is UV Curing
bull The conversion of liquid into a solid using Ultra Violet Light to initiate the drying process is known as UV curing system
bull 1st used industrially in 1940 to cure paints and coatings
bull The graphic arts industry embraced UV Technology only in the 70srsquo when 1st UV curable Lithographic inks were formulated
9
bull OligomerMain component of the formulation Provides main coating characteristics
bull MonomersUsed to control viscosity and contributes to shrinkage flexibility cure speed etc Also part of the crosslinking reaction
bull Photoinitiator Absorbs UV light and initiates the polymerization
reactionbull Pigment amp Fillersbull Additive ndash Surfactants DefoamersTackifiers etc
Components of A UV Formulation
10
UV Ink Raw Materials
11
Substrates Used for UV Inks
bull Paperbull Boardbull Plastic Filmbull Metallised Paperbull Aluminium Metal
12
bull Printing Process Application Areas
bull 1 Offset Sheet-fed 1 Over Carton- Boardbull 2 Web-fed Offset 2 For Business forms direct
mail lottery ticketsbull 3 Screen Printing 3 Paper Synthetic Substrate
CD Credit Cardsbull 4 Flexography 4 Paper or Synthetic substrate for labelsbull 5Letterpress 5 Paper or Synthetic substrate for labels
Application of UV Inks
13
Converting amp Printing Applications
14
bull An instantaneous drying process which givesHigher Productivity and Immediate post-processing
bull Dependable Drying Process which Minimizes the risk of Set- Offs amp Gives higher physical amp chemical Resistance with Excellent performance properties and Improved Aesthetics
bull Ecologically Cleaner Drying Process No VOCsrsquo during curing process ( Solvent Free )
bull Versatile Substrates including Heat Sensitive Materials
bull Compact Lamp systems contrast with Large IR or Hot Air drying Ovens ndash Reduced Floor Space Requirements
bull In-line processing capability and minimal manufacturing steps bull Energy Savings
Benefits - UV Process
15
bull High capital equipment costbull High material costbull Life of lampsbull Cleaning chemicalsbull Special rollers amp blanketsbull Plates bakingbull Shelf life and storagebull Personal protection Skin Irritant
Limitations ndash UV Process
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
7
8
What Is UV Curing
bull The conversion of liquid into a solid using Ultra Violet Light to initiate the drying process is known as UV curing system
bull 1st used industrially in 1940 to cure paints and coatings
bull The graphic arts industry embraced UV Technology only in the 70srsquo when 1st UV curable Lithographic inks were formulated
9
bull OligomerMain component of the formulation Provides main coating characteristics
bull MonomersUsed to control viscosity and contributes to shrinkage flexibility cure speed etc Also part of the crosslinking reaction
bull Photoinitiator Absorbs UV light and initiates the polymerization
reactionbull Pigment amp Fillersbull Additive ndash Surfactants DefoamersTackifiers etc
Components of A UV Formulation
10
UV Ink Raw Materials
11
Substrates Used for UV Inks
bull Paperbull Boardbull Plastic Filmbull Metallised Paperbull Aluminium Metal
12
bull Printing Process Application Areas
bull 1 Offset Sheet-fed 1 Over Carton- Boardbull 2 Web-fed Offset 2 For Business forms direct
mail lottery ticketsbull 3 Screen Printing 3 Paper Synthetic Substrate
CD Credit Cardsbull 4 Flexography 4 Paper or Synthetic substrate for labelsbull 5Letterpress 5 Paper or Synthetic substrate for labels
Application of UV Inks
13
Converting amp Printing Applications
14
bull An instantaneous drying process which givesHigher Productivity and Immediate post-processing
bull Dependable Drying Process which Minimizes the risk of Set- Offs amp Gives higher physical amp chemical Resistance with Excellent performance properties and Improved Aesthetics
bull Ecologically Cleaner Drying Process No VOCsrsquo during curing process ( Solvent Free )
bull Versatile Substrates including Heat Sensitive Materials
bull Compact Lamp systems contrast with Large IR or Hot Air drying Ovens ndash Reduced Floor Space Requirements
bull In-line processing capability and minimal manufacturing steps bull Energy Savings
Benefits - UV Process
15
bull High capital equipment costbull High material costbull Life of lampsbull Cleaning chemicalsbull Special rollers amp blanketsbull Plates bakingbull Shelf life and storagebull Personal protection Skin Irritant
Limitations ndash UV Process
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
8
What Is UV Curing
bull The conversion of liquid into a solid using Ultra Violet Light to initiate the drying process is known as UV curing system
bull 1st used industrially in 1940 to cure paints and coatings
bull The graphic arts industry embraced UV Technology only in the 70srsquo when 1st UV curable Lithographic inks were formulated
9
bull OligomerMain component of the formulation Provides main coating characteristics
bull MonomersUsed to control viscosity and contributes to shrinkage flexibility cure speed etc Also part of the crosslinking reaction
bull Photoinitiator Absorbs UV light and initiates the polymerization
reactionbull Pigment amp Fillersbull Additive ndash Surfactants DefoamersTackifiers etc
Components of A UV Formulation
10
UV Ink Raw Materials
11
Substrates Used for UV Inks
bull Paperbull Boardbull Plastic Filmbull Metallised Paperbull Aluminium Metal
12
bull Printing Process Application Areas
bull 1 Offset Sheet-fed 1 Over Carton- Boardbull 2 Web-fed Offset 2 For Business forms direct
mail lottery ticketsbull 3 Screen Printing 3 Paper Synthetic Substrate
CD Credit Cardsbull 4 Flexography 4 Paper or Synthetic substrate for labelsbull 5Letterpress 5 Paper or Synthetic substrate for labels
Application of UV Inks
13
Converting amp Printing Applications
14
bull An instantaneous drying process which givesHigher Productivity and Immediate post-processing
bull Dependable Drying Process which Minimizes the risk of Set- Offs amp Gives higher physical amp chemical Resistance with Excellent performance properties and Improved Aesthetics
bull Ecologically Cleaner Drying Process No VOCsrsquo during curing process ( Solvent Free )
bull Versatile Substrates including Heat Sensitive Materials
bull Compact Lamp systems contrast with Large IR or Hot Air drying Ovens ndash Reduced Floor Space Requirements
bull In-line processing capability and minimal manufacturing steps bull Energy Savings
Benefits - UV Process
15
bull High capital equipment costbull High material costbull Life of lampsbull Cleaning chemicalsbull Special rollers amp blanketsbull Plates bakingbull Shelf life and storagebull Personal protection Skin Irritant
Limitations ndash UV Process
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
9
bull OligomerMain component of the formulation Provides main coating characteristics
bull MonomersUsed to control viscosity and contributes to shrinkage flexibility cure speed etc Also part of the crosslinking reaction
bull Photoinitiator Absorbs UV light and initiates the polymerization
reactionbull Pigment amp Fillersbull Additive ndash Surfactants DefoamersTackifiers etc
Components of A UV Formulation
10
UV Ink Raw Materials
11
Substrates Used for UV Inks
bull Paperbull Boardbull Plastic Filmbull Metallised Paperbull Aluminium Metal
12
bull Printing Process Application Areas
bull 1 Offset Sheet-fed 1 Over Carton- Boardbull 2 Web-fed Offset 2 For Business forms direct
mail lottery ticketsbull 3 Screen Printing 3 Paper Synthetic Substrate
CD Credit Cardsbull 4 Flexography 4 Paper or Synthetic substrate for labelsbull 5Letterpress 5 Paper or Synthetic substrate for labels
Application of UV Inks
13
Converting amp Printing Applications
14
bull An instantaneous drying process which givesHigher Productivity and Immediate post-processing
bull Dependable Drying Process which Minimizes the risk of Set- Offs amp Gives higher physical amp chemical Resistance with Excellent performance properties and Improved Aesthetics
bull Ecologically Cleaner Drying Process No VOCsrsquo during curing process ( Solvent Free )
bull Versatile Substrates including Heat Sensitive Materials
bull Compact Lamp systems contrast with Large IR or Hot Air drying Ovens ndash Reduced Floor Space Requirements
bull In-line processing capability and minimal manufacturing steps bull Energy Savings
Benefits - UV Process
15
bull High capital equipment costbull High material costbull Life of lampsbull Cleaning chemicalsbull Special rollers amp blanketsbull Plates bakingbull Shelf life and storagebull Personal protection Skin Irritant
Limitations ndash UV Process
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
10
UV Ink Raw Materials
11
Substrates Used for UV Inks
bull Paperbull Boardbull Plastic Filmbull Metallised Paperbull Aluminium Metal
12
bull Printing Process Application Areas
bull 1 Offset Sheet-fed 1 Over Carton- Boardbull 2 Web-fed Offset 2 For Business forms direct
mail lottery ticketsbull 3 Screen Printing 3 Paper Synthetic Substrate
CD Credit Cardsbull 4 Flexography 4 Paper or Synthetic substrate for labelsbull 5Letterpress 5 Paper or Synthetic substrate for labels
Application of UV Inks
13
Converting amp Printing Applications
14
bull An instantaneous drying process which givesHigher Productivity and Immediate post-processing
bull Dependable Drying Process which Minimizes the risk of Set- Offs amp Gives higher physical amp chemical Resistance with Excellent performance properties and Improved Aesthetics
bull Ecologically Cleaner Drying Process No VOCsrsquo during curing process ( Solvent Free )
bull Versatile Substrates including Heat Sensitive Materials
bull Compact Lamp systems contrast with Large IR or Hot Air drying Ovens ndash Reduced Floor Space Requirements
bull In-line processing capability and minimal manufacturing steps bull Energy Savings
Benefits - UV Process
15
bull High capital equipment costbull High material costbull Life of lampsbull Cleaning chemicalsbull Special rollers amp blanketsbull Plates bakingbull Shelf life and storagebull Personal protection Skin Irritant
Limitations ndash UV Process
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
11
Substrates Used for UV Inks
bull Paperbull Boardbull Plastic Filmbull Metallised Paperbull Aluminium Metal
12
bull Printing Process Application Areas
bull 1 Offset Sheet-fed 1 Over Carton- Boardbull 2 Web-fed Offset 2 For Business forms direct
mail lottery ticketsbull 3 Screen Printing 3 Paper Synthetic Substrate
CD Credit Cardsbull 4 Flexography 4 Paper or Synthetic substrate for labelsbull 5Letterpress 5 Paper or Synthetic substrate for labels
Application of UV Inks
13
Converting amp Printing Applications
14
bull An instantaneous drying process which givesHigher Productivity and Immediate post-processing
bull Dependable Drying Process which Minimizes the risk of Set- Offs amp Gives higher physical amp chemical Resistance with Excellent performance properties and Improved Aesthetics
bull Ecologically Cleaner Drying Process No VOCsrsquo during curing process ( Solvent Free )
bull Versatile Substrates including Heat Sensitive Materials
bull Compact Lamp systems contrast with Large IR or Hot Air drying Ovens ndash Reduced Floor Space Requirements
bull In-line processing capability and minimal manufacturing steps bull Energy Savings
Benefits - UV Process
15
bull High capital equipment costbull High material costbull Life of lampsbull Cleaning chemicalsbull Special rollers amp blanketsbull Plates bakingbull Shelf life and storagebull Personal protection Skin Irritant
Limitations ndash UV Process
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
12
bull Printing Process Application Areas
bull 1 Offset Sheet-fed 1 Over Carton- Boardbull 2 Web-fed Offset 2 For Business forms direct
mail lottery ticketsbull 3 Screen Printing 3 Paper Synthetic Substrate
CD Credit Cardsbull 4 Flexography 4 Paper or Synthetic substrate for labelsbull 5Letterpress 5 Paper or Synthetic substrate for labels
Application of UV Inks
13
Converting amp Printing Applications
14
bull An instantaneous drying process which givesHigher Productivity and Immediate post-processing
bull Dependable Drying Process which Minimizes the risk of Set- Offs amp Gives higher physical amp chemical Resistance with Excellent performance properties and Improved Aesthetics
bull Ecologically Cleaner Drying Process No VOCsrsquo during curing process ( Solvent Free )
bull Versatile Substrates including Heat Sensitive Materials
bull Compact Lamp systems contrast with Large IR or Hot Air drying Ovens ndash Reduced Floor Space Requirements
bull In-line processing capability and minimal manufacturing steps bull Energy Savings
Benefits - UV Process
15
bull High capital equipment costbull High material costbull Life of lampsbull Cleaning chemicalsbull Special rollers amp blanketsbull Plates bakingbull Shelf life and storagebull Personal protection Skin Irritant
Limitations ndash UV Process
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
13
Converting amp Printing Applications
14
bull An instantaneous drying process which givesHigher Productivity and Immediate post-processing
bull Dependable Drying Process which Minimizes the risk of Set- Offs amp Gives higher physical amp chemical Resistance with Excellent performance properties and Improved Aesthetics
bull Ecologically Cleaner Drying Process No VOCsrsquo during curing process ( Solvent Free )
bull Versatile Substrates including Heat Sensitive Materials
bull Compact Lamp systems contrast with Large IR or Hot Air drying Ovens ndash Reduced Floor Space Requirements
bull In-line processing capability and minimal manufacturing steps bull Energy Savings
Benefits - UV Process
15
bull High capital equipment costbull High material costbull Life of lampsbull Cleaning chemicalsbull Special rollers amp blanketsbull Plates bakingbull Shelf life and storagebull Personal protection Skin Irritant
Limitations ndash UV Process
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
14
bull An instantaneous drying process which givesHigher Productivity and Immediate post-processing
bull Dependable Drying Process which Minimizes the risk of Set- Offs amp Gives higher physical amp chemical Resistance with Excellent performance properties and Improved Aesthetics
bull Ecologically Cleaner Drying Process No VOCsrsquo during curing process ( Solvent Free )
bull Versatile Substrates including Heat Sensitive Materials
bull Compact Lamp systems contrast with Large IR or Hot Air drying Ovens ndash Reduced Floor Space Requirements
bull In-line processing capability and minimal manufacturing steps bull Energy Savings
Benefits - UV Process
15
bull High capital equipment costbull High material costbull Life of lampsbull Cleaning chemicalsbull Special rollers amp blanketsbull Plates bakingbull Shelf life and storagebull Personal protection Skin Irritant
Limitations ndash UV Process
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
15
bull High capital equipment costbull High material costbull Life of lampsbull Cleaning chemicalsbull Special rollers amp blanketsbull Plates bakingbull Shelf life and storagebull Personal protection Skin Irritant
Limitations ndash UV Process
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
16
Polymer Cross Linking by a lsquochemical processrsquo initiated by UV Radiation
Drying Mechanism
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
17
UV Cure
Free Radical UV Curing Mechanism
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
18
Factors Influencing UV Curing Efficiency
bull Colours ( Pigmented amp Non- Pigmented) bull Film weight thickness bull Substrates (absorbent non-absorbent)bull Design layout (screen solid printing)bull Press speedbull Type of UV lampsbull Age of the UV lampsbull Efficiency of the UV - Radiatorsbull Type (Construction) of the reflectorsbull With or without interdeck curing
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
19
UV Machinery amp Equipment
A Emitters
B Reflectors
C Cooling
Systems
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
20
Typical UV equipment consists ofbull Lamp (or bulb) the electrical energy supplied to the bulb is converted into UV energy inside it bull Type of lamp (electrode electrodeless pulsed spot) bull Spectral output of lamp (ldquoHrdquordquoDrdquordquoVrdquo) bull Length of lamps (long lamps tend to sag) bull Reflector (elliptical parabolic diachronic) bull Focusedunfocused reflectors bull UV lamp output (200 to 600 wattsinch) bull Curing atmosphere (N2 ambientdry air) bull Required UV exposure (dwell time) bull Acceptable window of equipment operationbull Lamp housing reflects and focuses the UV energy
generated by the lamp (delivers the UV to the substrate)
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
21
Composed of a Quartz Tube ( inside of which contains typically Mercury in an Inert Atmosphere)
Conventional Electrode Type (Arc Lamp)
10487071048707200 to 750 wattin power 10487071048707Lengths up to 72 inches 104870710487072 to 3 min start up time 104870710487071000 hour typical life
UV Lamps
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
22
Medium Pressure Mercury Vapor Lamp
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
23
Reflectors Types
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
24
Heat Management
IR=45
UV=30 Visible=25
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
UV=30 Visible=25 IR=45
High Heat Output From Mercury Vapor Lamps (typical more than 50 of output is IR)
Cooling is Required
bull Air cooling (inerting difficult)bull Water cooling
bull Chill drumsbull Constant moving webbull Shuttersbull IR filtersbull Dichroic Reflectors
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
25
bull Clean reflectors amp lamps weekly by IPA with a smooth cotton cloth
bull Avoid frequent on amp off of lampbull Do not touch lamp with fingersbull Avoid dusty atmosphere nearby the lampsbull Do not open the dryer while runningbull Maintain the lamp cooling system
Maintenance of Reflectors amp Lamps
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
26
bull EPDM ndash In varnishes (shore hardness- 40)
bull NITRILE ndash More useful in inks (shore hardness- 30-35)
bull Nylon plates
Blankets amp Rollers
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
27
Possible Test Methods
bull Talcum Powder testbull Graphite Powder Testbull Tape Testbull MEK resistant testbull Potassium
permagnate Testbull Product Resistant
( Smear ) Test
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
28
Corona Requirement
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
29
Laboratory Testing Equipments
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
30
bull Keep away from Heat amp Direct Sunlight
bull Below temperature of 22deg C
bull Prefer to pack in Opaque container
bull Stock rotation is essential to avoid outdated stock
Storage of UV Products
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
31
bull Avoid skin-contact with UV products amp additivesbull Proactive gloves amp goggles should be wornbull Contaminated or soaked clothing should be
removed immediatelybull Never look directly at the UV Lampsbull If any contact is made with the skin it should be
washed immediately with soap
Protective Measures
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
32
Adhesion Ink can be removed easily when Tape Test is done
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
33
Curing ndash Ink film remains tacky or wet to touch
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
34
Dot Sharpness Halftone Dots increase in size causing printing screen and reverses to be plugged and appear muddy
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
35
Ghosting A printed area from another part of the form appears in large solids or dense halftones
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
36
Picking Lifting off of coating from coated stock and pulling fibres from uncoated stock
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
37
Wet Trapping Cannot achieve good coverage of one ink printing on top of another when not using the interstation lamp
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
38
Backing Ink backing away from fountain roller resulting in color variation
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
39
Hickies Blank area with a dot in the middle generally caused by a particle
40
THANK YOUby
RONAK JOSHI
40
THANK YOUby
RONAK JOSHI