types of tests. skin test purpose of test to test for allergy to colour products
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Types of Tests
Skin Test
Purpose of test
To test forallergy to
colourproducts
Skin Test
MethodWipe area of skin behindthe ear with surgicalspirits. Apply smallamount of proposedmixture to cleansed
area.Allow to dry naturallyLeave for 48hrs DO NOT COVER
Expected Result Negative Reaction Positive Reaction
No reaction Red inflamed itchy
When to do the test
• 48 hours before the application of permanent or quasi colours. Test should be carried out in the following circumstances:
• for a client new to the salon • for a client new to colour• for a client who has not had a colour
treatment in previous 12 weeks• If a client changes to a different colour
product or shade
Potential Consequences Of Not Carrying Out The Test
BBC News | HEALTH| Hair dye allergy'led to tragedy‘Potential for client to take legal action ifhair if damage toscalp occurs
Elasticity Test
Purpose
To determinethe conditionof the cortex
Elasticity Test
Method
Stretch one ortwo hairsbetween fingerand thumb
Elasticity Test
Expected ResultThe hair should
stretch andreturn to itsnormal lengthwithout breaking
Elasticity TestWhen to do the test- Before any chemical
process
Potential Consequences Of Not Carrying Out The Test
Damage to thehairPotential forclient to takelegal actionif damage tohair occurs
Porosity Test
Purpose of test To determinethe conditionof the cuticle
Porosity Test
MethodBefore wettingthe hair slidefingers fromPoint to root
Porosity Test
Expected Result
Hair should feel smooth
Porosity TestWhen to do the test- Before any chemical
process
Potential Consequences Of Not Carrying Out The Test
Damage to thehairPotential forclient to takelegal actionif damage tohair occurs
Strand Test
Purpose of test
To check thedevelopment ofcolour or bleachapplications
Strand Test
MethodRemove colouror bleach fromsmall strandsof hair
Strand Test
When to do the test
During the colour orbleach developmentprocess and aftermanufacturer’sRecommendeddevelopment time
Strand Test
Expected resultThe colour resultis as required ormay need furtherdevelopment time
Potential Consequences Of Not Carrying Out The Test
The result may notmeet requirements. If damage to scalp orhair occurs, for theclient to take legalaction.
Incompatibility Test
Purpose of test To determine thepresence ofmetallic salts
Incompatibility Test
MethodMix 1:20
ammoniumhydroxide and 6%H2O2 , place hair
cutting into mixtureand leave for up to30 minutes
Incompatibility Test Expected resultIf metalliccompounds arepresent the hair maychange colour, themixture may bubbleor fizz and heat maybe created
Incompatibility TestWhen to do the test- Before any chemical
process
Potential Consequences Of Not Carrying Out The Test
Disintegration ofhair, change of haircolour, damage to
thehairIf damage to the hairoccurs, potential forthe client to takelegal action
Test YourselvesPractice Quiz and Challenge Game For One or Two Players
Interactive Card Games and Word Search
Interactive Card Games
Development Test Curl
Purpose of test
To find out ifThe perm isFully
developed
Development Test Curl
MethodPartially unwind aRod and gently pushIt back on itself.Do this with aFew areas on thehead
Development Test Curl
Expected Result
The formationof an “s” shapeon the partiallyunwound hair
Development Test Curl
When to do the test
During the permingdevelopmentprocess and aftermanufacturer’sRecommendeddevelopment time
Potential Consequences Of Not Carrying Out The Test
Damage to thehairIf damage to thehair occurs,potential for theclient to take legalaction
Pre-perm Test Curl
Purpose of the Test
To find out the hair’s
suitabilityfor perming
Pre-perm Test Curl
MethodWind 2 or 3 rods inthe hairApply perm solution
and leave to process for manufacturer’s development time,
check then neutralise
Pre-perm Test Curl
Expected ResultIf the curl is strongand hair is in goodcondition – carry onwith permIf the hair has beenleft in poor conditionDO NOT PERM
Pre-perm Test Curl
When to do the test
When you haveconcerns whetherthe hair issuitable forperming
Potential Consequences Of Not Carrying Out The Test
Damage to thehairIf damage to thehair occurs,potential for theclient to take legalaction