| 摘要 |
The invention relates to oxidation dyes, containing at least one coupling component and at least one derivative of 5,6- dihydroxyindoline in an aqueous support substance, said 5,6-dihydroxyindoline being of formula (I), wherein R1 means hydrogen, a C1-C4 alkyl group or a C1-C4 hydroxyalkyl group, R2 means hydrogen or a -COOH- group which can also be a salt with a physiologically suitable cation, R3 is hydrogen or a C1-C4 alkyl group, R4 is hydrogen, a C1-C4 alkyl group or a group -CO-R6 wherein R6 represents a C1-C4 alkyl group, and R5 is one of the groups given for R4, independently of each other, or a physiologically suitable salt of these compounds with an organic or an inorganic acid. The inventive dyes are free from oxidation dye initial products of the developer component type, and produce a colour without red cast, especially in black tones. In particular, it is possible to dye partially or fully greying hair in shades which correspond very well with the non-greying hair. |
