Dirasol Diazo Emulsions

ProductInformation

Dirasol > Dirasol Rapid Dirasol 22 Dirasol 29 Dirasol 32 Dirasol 25 Dirasol T

Stencil Type LightBlue, Violet, LightViolet, Violet, LightViolet, Blue, 2packdiazo 2packdiazo 2packdiazo 2packdiazo 2packdiazo 2packdiazo directemulsion directemulsion directemulsion directemulsion directemulsion directemulsion

Ink Resistance Solvent-based, Solvent-based, Solvent-based, Solvent-based, Plastisol, WithSericure, conventionalUV conventionalUV conventionalUV conventionalUV waterbased allwaterbased dyeandpigment systems

Recommended Graphicand Graphicand Graphicand Graphic Textileprinting: WebtextileApplications Specialityprinting Specialityprinting Specialityprinting especiallyfine T-Shirts,sports printing line&halftone &fashionwear Definition Good Good Good Good Good Good

Resolution Good Good Good Excellent Good Good

Decoatability Good Good Excellent Good Fair Good,prior tohardening

Solids Content 29% 27% 33% 29% 38% 33% (Sensitised)

Dry Coating 25g/m2* 24g/m2* 28g/m2* 25g/m2* 67g/m2 53g/m2Weight

Stencil Build 6* 6* 7* 6* 21 18in microns Sensitised Viscosity 6,000 5,500 7,500 7,000 5,500 3,500at 25 (mPas) Approx. Life 2months 3months 3months 3months 3months 1monthSensitised (22)

Approx. Life 3months 3months 3months 3months 3months 1weekCoated Screen (22C)

*2+2coats120.40mesh2+2coats62.64mesh

Main Characteristics

PropertiesEmulsions for graphic & Speciality PrintingDirasol RapidOneofthefastestexposingdiazoemulsionsavailable. Ultra-fastexposure Excellentmechanicalresistance.

Dirasol 22Theall-roundemulsionwithawideexposurelatitudeandexcellentresolution. Wideexposurelatitude Excellentsolventresistance.

Dirasol 29Theeasiestdiazoemulsiontodecoat. Extremelyeasydecoating Excellentmeshbridging.

Dirasol 32Theemulsionforultra-finelineandhalftonereproduction. Excellentresolution.

Dirasol Rapid, 22, 29 and 32 are formulated for use with solvent-based and UV curing inks in graphic and speciality screen printing. Dirasol 25 is specially formulated for printers of T-shirts, sports and fashion wear, using water-based or plastisol inks.Dirasol T is for the textile reel to reel flatbed printer with either automatic machines or tables.

RAPID - 22 - 29 - 32 - 25 - T

Emulsion for Garment PrintingDirasol 25Areclaimableemulsionforfabricprintingusingplastisolsorwater-basedinks,adhesivesandpastes.Notresistanttoawater/solventmix.

Excellentmeshbridging Goodsee-throughforeasyregistration/settingup. CanbewaterproofedwithSericure.

Emulsion for Web Textile PrintingDirasol TOncetreatedwithSericureisimpervioustoallwater-baseddyeandpigmentsystemsfoundintextileprinting.

Solventfree/lowodour Extremelylongprintrunswithoutrequirementof over-lacquering EasilyreclaimedpriortoSericuretreatment.

SERICOL

Instructions for UseSafe LightingAllhandlingofDirasolemulsionsshouldbecarriedoutinlightoflowblueandultra-violetcontent.Aphotographicsafelightisnotessential,butitisadvisabletouseyelloworweaktungstenillumination.Ausefulformoflightfortheworkroomisprovidedbygoldfluorescenttubesanddaylightshouldbeexcludedorfilteredbyayellowlacquercoatingorfilmappliedoverwindows.

SensitisingDirasoldiazoemulsionsaresuppliedasatwopacksystemconsistingof:1. ColouredEmulsion

2. DiazoSensitiser

whichshouldbemixedasfollows:i) Partfillthesensitiserbottlewithwatertonotlessthan80%

ofitstotalcapacityandshakeituntilthesensitiserisfullydissolved.

ii) Addthesensitisersolutiontotheemulsionandthoroughlystir-inwithaplasticorwoodenstirringstick.Ideallytheemulsionshouldbeallowedtode-gasforonehourbeforeuse.

Preparing the ScreenDegreasethemeshinautomaticscreencleaningmachinesusingXtendPrep300SprayableDegreasingConcentrateorbyhandwithPrep102DegreasingandEmulsifyingConcentrate.WhendegreasingbyhandusingPrep102wetthescreenandapplywithaspongeorbrushandthenrubthemeshwithalightcircularmotion.Ensurethatbothsidesofthescreenarethoroughlytreated.LeavetostandforafewminutesandrinsewithcoldwatertoremovealltracesofPrep.Themeshmustbedrybeforecoatingwithemulsion.

Coating TroughsFujifilmCoatingTroughshavebeendesignedfortheaccurateandconsistentcoatingofdirectphotostencilemulsions.Thetroughsarecomposedofprecisionextrudedaluminiumchannellingfittedwithinjectionmouldedendpieces.Thealuminiumchannellingofthetroughshasahardanodisedfinishwhicheffectivelysealsthesurface.Thisfeaturemakesthetroughseasiertocleanandalsoprotectsthemfromcorrosion.Theendpieceshaveaspecialshoulderwhichensuresthatthecoatingedgeisconsistentlyattheoptimumangleinrelationtothescreen.Tohelpeliminatethebeadsformedattheextremitiesofconventionaltroughs,specialslotshavebeenincorporatedintotheendpieces.Thesefeaturespermitevenrelativelyinexperiencedoperatorstocoatscreensfasterandmoreconsistently.FujifilmCoatingTroughsaredesignedtodepositmediumcoatingthicknesses.Itisthereforepossibletocoatascreenuptoagivenstencilthicknesswithfewerstrokesthanwouldberequiredwithasharperorlesspreciseedge.

Automatic CoatingWhenusinganautomaticcoatingmachine,applyasimultaneoussinglecoattoeachsideofthescreen,followedbyasecondcoattothesqueegeeside.Ifahigherbuildisrequired,extracoatsshouldbeappliedtothesqueegeesideofthescreen.

Hand CoatingDirasol Rapid, 22, 29, 32 and 25Standthescreenonedgeslightlyinclinedawayfromtheoperatorandprocessthescreenasfollows:Applyoneortwocoats,wetonwet,ontheprintsideofthescreenandthenapplyextracoatsonthesqueegeesideofthescreendependingonthestencilbuildrequired.

Dirasol Diazo EmulsionsDirasol TStandthescreenonedge,slightlyinclinedawayfromtheoperator,andprocessthescreenasfollows:

1. Applyoneormorecoatswetonwetontheprintsideofthescreentofillthemesh,thethicknessofthefinishedstencilbeingcontrolledbythemeshgrade.

2. Ascrapecoattoimprovecosmeticappearancemaybeappliedonthesqueegeeside.

Coatingfrombothsidesisneithernecessarynordesirableasthiscanentrapairbubbles,givingrisetoweakspots.Thisisespeciallylikelywithmonofilamentmeshescoarserthan43.80.

DryingDrythescreeninahorizontalposition,squeegeesideup,indarknessorsubduedyellowlight.Awarmairfanorwellventilatedheatedcupboard(upto40C)maybeusedbutcareshouldbetakennottoblowdustontothedryingscreen.Dirasolscreensmaybestoredinthedarkatcooltemperaturespriortoexposure.SeeparagraphStorageforrecommendedmaximumperiod.

ExposureCorrectexposureismostimportanttoobtainoptimumresolution,definitionandstencillife.Toestablishthis,withanunfamiliaremulsionorlightsource,theuseofanexposuretestscaleisrecommended. Thiscanbedoneby:

1. Usinganexposurecalculator.

2. Placingafinedetailpositivefilmoveracoatedscreenandgivingitaseriesofsteppedexposuresusingablackpapermask. Theexposuretimeisusuallydoubledfromonesteptothenext.Thecorrectexposureisthelongestexposurethatcanbegivenwhilststillobtainingoptimumstencilresolutionanddefinitionafterwashout.Over-exposedareaswouldresultinlossofdetail,whilstunder-exposedareasmayresultinweak,thinstencils.

Positionthepositive,emulsionsideincontactwiththeDirasolcoating,ontheundersideofthedryscreen,securingwithtape.Thenplacethecompletescreenintothevacuumprintdownframeandensureperfectcontactbeforeexposingtolight.Thelengthofexposuretimedependsonthelightsource,thethicknessoftheDirasolcoating,thefinenessandcolourofthemesh,andthetransparencyofthebackgroundofthepositive.Thefollowingguidecanbethebasisofaninitialtestexposure.

Exposure Guide (seconds)

Dirasol 22 25 Rapid 29 32 T

50 Amp Open Carbon Arc at 120cm 1330-1420 665-810 720-840 1080-12001500-1800 450-510

HPR 125W Mercury Vapour Lamp at 50cm 740-860 370-430 360-440 630-730 830-970 230-285

Metal Halide Lamps at 120cm1000W 740-860 370-430 360-440 630-730 830-970 230-2852000W 360-440 180-220 180-220 310-370 410-490 115-1453000W 240-300 120-150 110-150 210-250 270-330 70-905000W 140-180 70-90 70-90 120-160 160-200 45-556000W 110-150 55-75 60-80 90-130 130-170 50-70

Dirasol Diazo EmulsionsStandard packingDoublePack9(2x4.5)litreemulsion.DVL47 DirasolRapidSZK96 Dirasol22DTT34 Dirasol29DGU15 Dirasol32DYL33 Dirasol25DWU51 DirasolT

Mini-JumboPack-EmulsionandDiazoSensitisertomake5.4(6x0.9)litres.DVL47 DirasolRapidSZK96 Dirasol22DTT34 Dirasol29DGU15 Dirasol32DYL33 Dirasol25DWU51 DirasolT

StorageUnsensitisedDirasolshouldbestoredinascoolatemperatureaspossible,butnotbelow5Corabove35C.SensitisedDirasolshouldbestoredundersimilarconditions,initsoriginalcontainerwiththelidsealed.Theproductwillremainstableat22Cfor3months,butthiscanbeextendedbykeepinginahouseholdtyperefrigerator.Thestoragetimewillbesignificantlyreducedasthetemperatureincreasesabove22C.

Storage Limits of Sensitised Dirasol (months)Dirasol 22/25/29/32 Rapid T20C-25C 3 2 1InHouseholdRefrigerator 6 4 2

Safety and HandlingDirasol Emulsions:

Areformulatedtobefreefromanychemicalstoxictohealth,carcinogenic,mutagenicorreprotoxicaccordingtoDirective67/548/EC

hasaflashpointgreaterthan55CandisthereforenotclassifiedasadangeroussubstanceundertheDangerousSubstancesandExplosiveAtmospheresRegulations(DSEAR).

ComprehensiveinformationontheSafetyandHandlingofDirasolEmulsionsandDiazoSensitiserisgivenintheappropriateSafetyDataSheets.

Fujifilm Speciality Ink Systems Limited: HascertificationtotheInternationalEnvironmentalStandard,

ISO14001.

Iscommittedtominimisingtherisktousersofourproducts,andalsotominimisingtheimpactofouractivitiesontheenvironment,fromformulationthroughtoproductionandsupply.

Research&developmentteam,worktoaninhouseHealth,SafetyandEnvironmentalpolicy,termedDesignforHealth,SafetyandEnvironment,withtheaimofproactivelydevelopingproductswiththeleastimpactonhealth,safetyandtheenvironment.

Regularlyreviewandmonitorourimpactsandactivities,settingobjectivesandtargetsaspartofacontinualimprovementprocess.

Iscommittedtoreducingwastethroughbetteruseofrawmaterials,energy,water,re-useandrecycling.

Theexposurevaluesquotedarethetimesrequiredtofullycureandthereforecompletelyhardenthesensitisedemulsionona120.40dyed(62.64whiteforDirasols25andT)monofilamentscreen,witha2+2coating(seealsoDirasolTtechnique).Usingthesethrough-cureexposurevaluespreventsemulsionbeingwashedawayduringdevelopmentandensuresstencilsofoptimumresolution,definition,durabilityanddecoatability.Stainlesssteel,dyedfabricsandmulti-coatstencilsrequirelongerexposure.

DevelopingPlacethescreeninasinkorautomaticdevelopingmachineandgentlyspraybothsideswithcoldorwarmwater(notabove40C).After1-2minutesthespraypressurecanbeincreasedslightly.Continuedevelopinguntilallpartsoftheimageappearcleanandsharp.Immediatelyafterdeveloping,removesurfacemoisturewithascreenvacuumorbygentlymoppingbothsidesofthescreen(whichshouldbeinahorizontalposition)withasoftmoistchamoisleather.Thiswillspeedfinaldryingandalsoremoveanyimpuritiesthatmightclingtotheopenareasofthescreen.

Final Drying and Spotting OutDrythestencilwiththeaidofawarmairfan.Anysmallblemishesorpinholes,usuallycausedbydustspecksorspotsonthepositive,canbefilledinbyspottingoutwithabrushcontainingscreenfillerorsensitisedDirasolemulsion.Afterspottingout,thescreenisreadyforprinting.Dirasols 25 and T should be re-exposed when used as a spot out with resistance to water-based inks.

Waterproofing Dirasol Stencils(SeeProductInformationSheetonXtendScreenFillersandStencilTreatment)

Sericure (SCK81)Sericureisasolutionwhichcanbeusedtoproducewaterresistantstencils.SericureissuitableforusewithallDirasolstencilsonpolyesterandstainlesssteelmesh.StencilstreatedwithSericurearemoredifficulttoreclaim.

Instructions for use1. ApplySericuretobothsidesofthestencilusingasoftbrush orsponge.

2. Formaximumstencildurabilityallowtreatedstenciltostand overnight,orleavetostandatroomtemperatureforonehour andthenplaceinfrontofhotfans(above40C)forafurther hour.

Reclaiming the ScreenInautomaticscreencleaningmachines,removeinkresiduesusinganXtendScreenCleaneranddecoatstencilusingdilutedXtendStripLiquidConcentrate.Whenremovingbyhand,removealltracesofinkwitharagsoakedinXtendScreenCleaner.RinsethescreenwithwaterandthenapplydilutedXtendStriptobothsidesofthestencil.Leaveforafewminutes.Thestencilcanthenbeeasilyremovedwithastrongwaterjetorhighpressurewatergun.

Environmental DataDirasol Emulsions:

DonotcontainozonedepletingchemicalsasdescribedintheMontrealConvention.

AremoderatelybiodegradableasdeterminedbytheOECD301DClosedBottleTest,tosolvent-basedproducts.

a. Accidentalexposure-Checkemulsionandcoatedscreenhavenotbeenexposedtolightsourceordaylight.b. Screendriedwithexcessiveheat-Dryattemperaturenotexceeding40C.Avoidhotspots.c. Maximumstoragelifeofsensitisedemulsionorcoatedscreenexceeded.

a. Unevencoatingonscreen-Ensurescreenistautandcoatingtroughisundamaged.b. Montagepositivescomprisedoffilmsofdifferentclarity-Usesametypefilmforimagearea.c. Exposuretimeexcessivefordetailareasofdesign-Usedyedmeshorreduceexposure.d. Unevencontact-Checkvacuumframeforcontactbetweenpositivesandscreen.e. Over-exposure-Reduceexposuretime.f. Inadequatepositiveopacity-Checkdensityandadjust.

a. Inadequatewashingout-Mopupexcesswaterfromstencils.b. Inadequateexposureresultinginemulsiononsqueegeesideofstencilrunningdownscreencausingblocking

duringdevelopmentorhardening.c. Unevencoatingonscreen-Ensurescreenistautandcoatingtroughundamaged.

a. Inadequateexposure-Dyed,multifilamentandstainlesssteelmeshesormultiplecoatingsallrequirelongerexposure.Abrownstainedmeshafterreclaimingindicatesunder-exposure.

b. Emulsionunder-sensitised-Ensuresensitiserisdissolvedandcompletelymixedwithemulsion.c. Meshimproperlypreparedanddegreased.d. Excessivewaterpressurebeingusedindevelopment.e. Incorrectcoatingtechnique-Coatbothsidesofmesh.f. Stencilnotproperlydried-Ensuremoisturecanescapewhendrying.

a. Screendevelopedwithexcessivewaterpressure-Pre-soakscreenandusegentlespray.b. Lightscatter-Useddyedmesh.c. Insufficientcontact-Ensureevencontactbetweenpositiveandscreen.d. Meshtoocoarsefordesign.e. Insufficientbuildofemulsion-Coatsqueegeesidelast.f. Inadequateexposure-Increaseexposure.

a. Screenimproperlyprepared-ThoroughlydegreasewithXtendPrep102or300.b. Blemishesoncoating-Ensurecoatingtroughedgeiscleanandnoskinparticleshaveformedonsurfaceof

uncoveredemulsioninthetrough.c. Environmentalcontaminants-Cleanworkingareaandlimitdustcontamination.

a. Dirtyglassorpositiveduringexposure.b. Coatingtoofast-Slowdowntoallowmeshaperturetofullyfillwithoutaeration.c. Airbubblesinemulsion-Allowtimetodegasaftermixingwithsensitiser.d. Under-exposure-Increaseexposuretimestoavoidweakstencil.

1. Imagedoesnotwashout.

2. Onlypartofimagewashesout.

3. Apparentlyopenareasofstencilwillnotprint.

4.Exposedstencilwashingawayfromscreenorprematurestencilbreakdown.

5. Imagehasexcessivesawtooth.

6.FishEyes

7.PinholesinScreen

Problems and Solutions

Faults Probable Cause and Remedies

The information and recommendations contained in this Product Information sheet, as well as technical advice otherwise given by representatives of Fujifilm Speciality Ink Systems Limited and its associated companies, whether verbally or in writing, are based on our present knowledge and believed to be accurate. However, no guarantee regarding their accuracy is given as we cannot cover or anticipate every possible application of our products and because manufacturing methods, printing stocks and other materials vary. For the same reason our products are sold without warranty and on condition that users shall make their own tests to satisfy themselves that they will meet fully their particular requirements. Our policy of continuous product improvement might make some of the information contained in this Product Information sheet out of date and users are requested to ensure that they follow current recommendations.

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