PROCEDE DE COLORATION CAPILLAIRE METTANT EN ŒUVRE UNE ETAPE DE COLORATION A PARTIR D'UN COLORANT, ET D'UN SEL DE TITANE ET UNE ETAPE DE REVELATION A PARTIR D'AGENT ALCALIN COMPORTANT AU PLUS UNE FONCTION AMINE

The present invention relates to a process for dyeing keratin fibres, in particular human keratin fibres such as the hair, comprising at least two steps in which said fibres are treated first with a cosmetic dye composition Ci) comprising a) one or more dyes, which are preferably natural, b) one or more titanium salts and b1) optionally one or more particular carboxylic acids, and said fibres are then treated with a cosmetic revealing composition Cii) comprising c) one or more alkaline agents each comprising not more than one amine function and d) optionally one or more chemical oxidizing agents; to a cosmetic composition comprising ingredients a), b), b1), c) and d) as defined previously; and to a multi-compartment device comprising ingredients a), b), b1), c) and d).