PROCESS FOR DYEING KERATIN FIBRES USING AT LEAST ONE DISULFIDE, THIOL OR PROTECTED-THIOL FLUORESCENT DYE AND AT LEAST ONE ACTIVATOR COMPRISING A REDUCING AGENT AND AT LEAST TWO DIFFERENT ALKALINE AGENTS

摘要

The present invention relates to a process for dyeing and/or lightening keratin fibres, in particular human keratin fibres such as the hair, using a) one or more disulfide, thiol or protected-thiol fluorescent direct dyes and b) an activating agent comprising i) at least one reducing agent and ii) at least two alkaline agents that are different from one another. The present invention also relates to a cosmetic composition comprising the dyes a) as defined above, i) at least one reducing agent, and ii) at least two alkaline agents that are different from one another, and also to a multi-compartment device containing the ingredients a) and b). The combination of the activating agent(s) b) and of the disulfide, thiol or protected-thiol fluorescent direct dye(s) a) makes it possible in particular to obtain colourings which are very chromatic and particularly visible, having good colouring properties, in particular in terms of chromaticity, intensity and colour build-up.