Pheomelanin - Yellow-red/brown pigment, the main pigment in red haired clients, Eumelanin - The black/brown pigments, when this is present in only small amounts the hair may be blonde, Elasticity test - Checks the internal strength of the cortex, Visual aids - These can include style books, colour charts, colour swatches, Quasi permanent - These are mixed with low level peroxides,. Smaller molecules entre the the cortex and designed to wash out over time, Hydrogen peroxide - Also knows as H202. Causes a chemical reaction when mixed with colour/lightening products., Temporary - This type of colour has large molecules that coat the hair's cuticle, Oxymelanin - Colourless pigment, Permanent - This type of colour has smaller molecules that enter the cortex, swell and become trapped, Accelerator - This can be used to speed up a colour process, Henna - Vegetable colourants. These stain the cuticle and build up intensity, Melanin - Colour pigment, Manufacturers - These instructions must always be read and followed before and process, Metallic salts - What does an incompatability test check for, Oxidisation - What occurs when mixing a permanent colour with hydrogen peroxide, Pintail comb - Used for sectioning, to divide the hair, keeps hair in place for colouring services, ICC - The international colour chart, Seepage - This can occur when the over used of product in applied to a foil, Antioxidant - The type of condition that should be used following a chemical service, Colour pigment - These consist of eumelanin and pheomelanin,

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