Productgroup
Hair dyes (oxidative)
Description
Oxidation hair dyes form permanent colours from uncoloured precursors on and in the hair, which are permanently adhering and cannot be washed out. An alkalising agent (eg gel or cream with ammonia) lets the hair swell so that the colour precursors and oxidants (eg lotion or solution with hydrogen peroxide) penetrate more easily into the interior of the hair. Based on the colourless colourant precursors (referred to as developer and coupler), dyes are formed by means of an oxidant which are permanently anchored in the hair. The final colour result is attributable to different couplers and developers (substituted diaminobenzenes, aminophenols or dihydroxybenzenes). Depending on the colouring capacity it is distinguished between intensive colouring, oxidative tinting, hair colours or colorations. Usual application forms are caring cream, gel or shampoo formulations. The basis of the cream colours is made up of ethoxylated or sulphated fatty alcohols, fatty amides or ethoxylated vegetable oils. These products are often complemented by caring components such as cationic polymers and lanolin derivatives. Hair dyeing gels are oily liquids which form a gel when mixed with hydrogen peroxide. They are formulated on the basis of soaps (AMMONIUM OLEATE), ethoxylated non-ionic, surface-active substances or anion / cation complexes or mixtures of these substances. Colouring shampoos have a similar composition to gels but contain in addition foaming raw materials. Furthermore, oxidative hair colorants also contain antioxidants (eg sodium sulfite or ascorbic acid), thickeners and perfume oils.