Types of Tests

Skin Test Purpose of test To test for allergy to colour products

Skin Test Method Wipe area of skin behind the ear with surgical spirits. Apply small amount of proposed mixture to cleansed area. Allow to dry naturally Leave 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 if hair if damage to scalp occurs

Elasticity Test Purpose To determine the condition of the cortex

Elasticity Test Stretch one or two hairs between finger and thumb Method Stretch one or two hairs between finger and thumb

Elasticity Test Expected Result The hair should stretch and return to its normal length without breaking

Elasticity Test When to do the test- Before any chemical process

Potential Consequences Of Not Carrying Out The Test Damage to the hair Potential for client to take legal action if damage to hair occurs

Porosity Test Purpose of test To determine the condition of the cuticle

Porosity Test Method Before wetting the hair slide fingers from Point to root

  Porosity Test Expected Result Hair should feel smooth

Porosity Test When to do the test- Before any chemical process

Potential Consequences Of Not Carrying Out The Test Damage to the hair Potential for client to take legal action if damage to hair occurs

Strand Test Purpose of test To check the development of colour or bleach applications

Strand Test Method Remove colour or bleach from small strands of hair

Strand Test When to do the test During the colour or bleach development process and after manufacturer’s Recommended development time

Strand Test Expected result The colour result is as required or may need further development time

Potential Consequences Of Not Carrying Out The Test The result may not meet requirements. If damage to scalp or hair occurs, for the client to take legal action.

Incompatibility Test Purpose of test To determine the presence of metallic salts

Incompatibility Test Method Mix 1:20 ammonium hydroxide and 6% H2O2 , place hair cutting into mixture and leave for up to 30 minutes

Incompatibility Test Expected result If metallic compounds are present the hair may change colour, the mixture may bubble or fizz and heat may be created

Incompatibility Test When to do the test- Before any chemical process

Potential Consequences Of Not Carrying Out The Test Disintegration of hair, change of hair colour, damage to the hair If damage to the hair occurs, potential for the client to take legal action

Test Yourselves Practice 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 if The perm is Fully developed

Development Test Curl Method Partially unwind a Rod and gently push It back on itself. Do this with a Few areas on the head

Development Test Curl Expected Result The formation of an “s” shape on the partially unwound hair

Development Test Curl When to do the test During the perming process and after manufacturer’s Recommended development time

Potential Consequences Of Not Carrying Out The Test Damage to the hair If damage to the hair occurs, potential for the client to take legal action

Pre-perm Test Curl Purpose of the Test To find out the hair’s suitability for perming

Pre-perm Test Curl Method Wind 2 or 3 rods in the hair Apply perm solution and leave to process for manufacturer’s development time, check then neutralise

Pre-perm Test Curl Expected Result If the curl is strong and hair is in good condition – carry on with perm If the hair has been left in poor condition DO NOT PERM

Pre-perm Test Curl When to do the test When you have concerns whether the hair is suitable for perming

Potential Consequences Of Not Carrying Out The Test Damage to the hair If damage to the hair occurs, potential for the client to take legal action