| abstract |
(57) [Summary] [Object] The present invention is directed to a method for dyeing keratin fibers and a composition used therefor. ## STR1 ## This method is carried out in a medium suitable for dyeing with the formula: (In the formula, R 1 represents a hydrogen atom, a C 1 -C 4 alkyl group, and R 2 and R 3, which may be different, are a hydrogen atom, C 1 To C 4 lower alkyl group, carpoxyl group or alkoxycarbonyl group, X represents a hydrogen atom, a C 1 to C 4 lower alkyl group, a C to C 18 alkoxy group, a halogen atom, a C 2 to C 20 acyloxy group, acetylamino. Group, wherein the OH group occupies the 5 or 6 or 7 position of the aromatic ring) and at least one indole coupler and a hydrochloric acid dye precursor of this compound, a pH lower than 7 containing an oxidizing agent It consists of applying the composition to keratin fibers, in particular human keratin fibers such as hair. |