Pre -Softening  - Used on resistant hair, 6% used to open the cuticle scales to allow colour to enter the cortex., Pre- Pigmentation  - To replace the pigments that have been removed when lightening. To add warmth when going darker to prevent the hair going green., Pre- Conditioning - To even out the porosity before colouring so the timing is the same , Reduction - The addition of hydrogen and removal of oxygen. Removal of artificial colour, Oxidation  - Term given to a chemical process that involves the addition of oxygen., Creeping Oxidation - If colour remains in the hair structural damage may occur, oxidation still continuing in the cortex., Pheo melanin - Natural red/yellow pigments, Eumelanin - Natural black/brown pigments, Pre-Lighten - A lightening product used when the required amount fo lift cannot be achieved using permanent colour, Colouring Fork - Used for streaking/highlighting , Colour Wrap - A product that can be used for block colouring effects, Porosity Test - To check the condition of the cuticle layers and the hairs ability to absorb chemicals, Peroxide test - Used after colour stripping or reduction to see if all the colour has been removed, Rollerball or Climazone - Used to accelerate colours development time, Hair Steamer  - used for accelerating colours and lighteners you need to check the water is at the correct level., Infill colour - a colour placed in between foils. Ideal fro clients that have grey hair but still like a colour combination., Depth - The lightness or darkness of hair colour is known as this, Adverse reaction - When a client has a unfavourable reaction to a skin test, Patchy result - If the hair is porous you will get this colour result, Probing question  - Digging deeper with questions to find out more informatio, Tertiary colour - The mixture of a primary and secondary colour, Banding - Where colour appears in a line usually from overlapping colour or incorrect colour choice, Elasticity test - To check the internal strength in the cortex of the hair, Hypersensitivity test - Also known as a skin test or patch test, Lightener - A product that has the ability to lift but does not deposit tone, Strand test - Test done during colouring to check the development,

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