HAIR DYEING METHOD EMPLOYING AT LEAST ONE ORTHO-DIPHENOL, ONE TITANIUM DERIVATIVE AND ONE CARBOXYLIC ACID

摘要

The present invention relates to a method for dyeing keratinous fibres, in particular human keratinous fibres, such as the hair, in which the said fibres are treated starting from one or more cosmetic compositions comprising a) one or more ortho-diphenol(s), b) one or more inorganic titanium salt(s) or alkoxytitanium(s), c) one or more acid(s) and d) optionally one or more chemical oxidizing agent(s), such as hydrogen peroxide or one or more hydrogen peroxide generating system(s).