Tests and Testing• Skin Test• Elasticity Test• Porosity Test• Strand Test• Incompatibility Test• Test Cutting

SKIN TESTING THERE ARE 2 REASONS WHY WE SKIN TEST1. to get a result – Para content in tint2 .as a duty to careThere are 2 types of reactions 1. Allergic2. Irritant

Irritant• Client may be sensitive to an ingredient or the product you are

applying• They can also have an irritant reaction to the smell of the

product• This is an external reaction• It is confined to the area product is applied to

Allergic reaction• It is only as a formality we check for an allergic reaction• Allergic reaction can occur at anytime• Takes up to 24-48 hours to occur• This is a severe reaction • The immune system starts to fight • Antibodies change shape and swell

Allergic reaction• Blisters on the skin taking several weeks to heal• Anaphylactic shock- severest reaction DEATH

Allergic reaction to hair colour

Allergic reaction to hair colour

Allergic reaction

Allergic reaction

How do we skin test

• Each company have their own way of testing• Always follow manufacturers guidelines• Wella-Mix a small amount of colour with peroxide and place

behind ear with cotton bud • Inform client that it must stay on for the next 24-48 hrs and of

the type of reaction that may occur if there is an allergy

Symptoms• Hot spots • Heat• Stinging• This is due to blood capillaries been aggravated in the dermis• If this type of reactions occur you must remove the product

immediately• By not skin testing we are open to being sued and permanent

damage to your business

Elasticity test• Purpose is to check the hairs internal strength• Hair in good condition can hold a 100gms in weight• Hair in poor condition can hold only 30gms in weight• Hair which is in poor condition will not hold colour well as

there is to much space in the cortex• Hair in poor conditioned is known as sensitised hair

Elasticity test• To perform an elasticity test

• Take a few strands of hair and stretch between fingers

• Hair in good condition will stretch and return • Hair in poor condition will not return

Porosity test• 2 types of porous hair• Naturally porous hair• Chemically /physically porous• Purpose of the test is to check the hairs ability to absorb

moisture in varying degrees• Condition of the cuticle- EXTERNAL DAMAGE• If the hair is externally damaged the effect is on the outside • Cuticle scales could be broken or missing

Incompatibility test• We are looking for a reaction due to metallic salts being

present in the hair• Compound henna, some colour sticks, sun in

• These products can contain metallic salts which can have an adverse reaction to professional products

Incompatibility Test• If no test was carried you could jeopardise the condition of the

hair• Breakage or complete disintegration• If client has used home colour ALWAYS carry out an

incompatibility test• To test- take cuttings of hair from various areas of the head• Place in an non metallic bowl with 20ml of 20vol liquid + 1ml

ammonia solution

Incompatibility • Leave for 3-5 mins • Look for signs of bubbling attracting along the hair shaft • Fizzing , heat, discolouration of hair, disintegration of hair• If any of these reactions occur never proceed with colour

Colour Test or Test Cutting• Test cutting – done prior to colouring to check if colour result

will be even or will be achievable• Will the hair tolerate the service• To perform the test apply your chosen colour to various

cuttings from round the head (discreet areas) • Develop for full development time • Rinse, dry and check

Colour Test / Test Cutting• Negative Result• When the desired colour is not achieved or unsuitable for

client• DO NOT PROCEED WITH COLOUR SERVICE• Positive Result• When the desired colour has been achieved and is suitable for

the client• PROCEED WITH COLOUR SERVICE

Strand test• This test is performed during the colouring process• Ideally to check the lightening on bleaching and tones when

using toner• Remove a piece of colour using damp cotton wool • If colour achieved rinse and remove colour• If colour not achieved massage product back into area

removed from and further develop