Factor - Something which you need to take into account before starting a colour or lightening service. , Contra indication - Something which will limit or prevent a colour or lightening service from being carried out, Eumelanin - These pigments are cooler toned, made up of predominantly blue and green tones. They are responsible for black and brown hair. Eumelanin molecules are larger than pheomelanin molecules., Pheomelanin - These pigments are warmer toned, made up of predominantly yellow, orange and red tones. They are responsible for yellow and red hair. Pheomelanin molecules are smaller than eumelanin molecules, making it harder for them to be removed from the hair., Oxymelanin - The colourless molecule produced when hair is lightened, Underlying tone - The tone that is exposed at each depth when hair is lightened, Pre-softening - A technique used when colouring resistant hair. Liquid peroxide (6%) is applied to the resistant areas of the hair and then dried in. This opens the cuticles to allow the colour to penetrate into the cortex., Pre-lightening - A technique used to lighten hair when the target shade cannot be achieved using colour, Pre-pigmentation - Replacing pigments lost when the hair is lightened. Pre-pigmentation must be used when going darker to stop the hair going khaki (green) and patchy, Colour reducer (reduction) - A product which reduces the size of the colour molecules in the hair allowing them to be removed when the hair is shampooed. Only effects artificial colour, Primary colour - Red, blue and yellow. Primary colours cannot be made, Secondary colour - Green, violet and orange. Secondary colours are made by mixing 2 primary colours together, Teritary colour - A mixture of primary and secondary colours, Depth - How light or dark the hair is, Tone - The colour you see. For example, red, copper, blonde, brunette, International Colour Chart (ICC) - An international system which allows stylists to identity the depth of the hair. Most manufacturers use this to identity their colour range depth.,

Colouring

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