1) Porosity test a) wet the hair and stretch b) Wash the hair test at basin  c) Run fingers along cuticle  2) Elasticity test a) Wet the hair and stretch to check internal structure   b) Mix ammonia and liquid peroxide together  c) Spot the product behind the ear 3) Skin test a) to check internal structure b) Add a spot of mixed colour behind the ear checking for allergic reaction c) mmonia and liquid peroxide together 4) Incompatibility test a) Mix 20ml of peroxide and 2ml of ammonia to check for a reaction  b) Wash the hair test at basin c) Run fingers along cuticle 5) Colour test  a) Colour a piece of hair to determine the Colour b) Mix 20ml of peroxide and 2ml of ammoni c) Run fingers along cuticle

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