OXIDATIONSFAERBEMITTEL FUER KERATINFASERN

摘要

The use of indolins of formula (I), in which R<1>, R<2>, R<3>, R<4> and R<5> are independently hydrogen or alkyl groups with 1 - 4 C atoms, or R<4> and R<5>, together with the oxygen atoms to which they are bonded, represent an alkylene-dioxy group with 1 - 4 C atoms, or their salts, as pre-products for oxidation colorants gives natural brown hair colourings. The indolins of formula (I) are also suitable as couplers in oxidation hair colorants with a customary developer compound content, when they result in a modification of the tints obtainable with the developer. They are used in ordinary vehicles, e.g. in gel or emulsion form, preferably mixed before use or on the hair with a colorant-developing oxidising agent.