L3 Colour Correction glossary of terms

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Bands of colour

Back

A band of colour usually appears as a result of incorrect application or incorrect colour choice so that a band of hair is different from the rest of the hair.

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Contra-indications

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Conditions that would prevent you from continuing with the colour correction service, e.g. skin sensitivities, an allergy or a skin disorder.

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Elasticity

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A test to check the internal structure (cortex) of the hair.

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Influencing factors

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Factors to consider before and during a correction service, including existing colour, and the condition of the hair and scalp.

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Irritant contact dermatitis

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A skin condition that can develop at any time, causing skin to become dry, red, itchy, flaky, scaly, and can even blister.

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Melanin

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Pigment that gives hair its colour.

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Oxidation

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A chemical process involving the addition of oxygen. In hair colouring and bleaching, the oxygen comes from hydrogen peroxide.

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Permanent colour

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Also known as Paraphenylenediamine/para dyes/PPD or oxidation tints. Permanent colour can lighten or darken hair and add tone.

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Pre-pigmentation

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Restoring and adding missing warm tones to the hair that has previously been removed as a result of lightening or the use of colour remover.

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Reduction

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The addition of hydrogen and removal of oxygen. Artificial colour may be removed from the hair using a colour reducer that works by a process of reduction.