| 摘要 |
The present invention relates to a dye composition comprising, in a suitable cosmetic medium, a 1H-pyrazolyl-ethenyl-indolium derivative of formula (I) below: in which R1 represents a linear or branched C1-C4 alkyl radical or a C1-C4 aralkyl radical, R2 represents a hydrogen atom, a C1-C4 alkyl radical, a C1-C4 alkoxy radical, a halogen atom or a nitro group; R3 and R4, which may be identical or different, represent a hydrogen atom, a C1-C4 alkyl radical, an aryl radical which may be substituted with one radical R chosen from a halogen atom, a hydroxyl radical, a C1-C4 alkyl radical, a C1-C4 alkoxy radical, a carboxyl radical and a trifluoromethyl radical, R5 represents a hydrogen atom, a C1-C4 alkyl radical or an aryl radical that may be substituted with one radical R, and X is a counterion. Such a composition makes it possible to obtain direct colourations that are particularly resistant to external agents, in particular to shampoo.
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