| abstract |
The disclosure relates to a method for dyeing keratinous fibers by applying, to said fibers, i) at least one entity chosen from ortho-diphenol and derivatives thereof, ii) at least one metal salt, iii) hydrogen peroxide or at least one system which generates hydrogen peroxide, and iv) at least one (bi)carbonate, wherein the method for coloring keratinous fibers is carried out in at least two stages. The disclosure also relates to a multicompartment device containing compositions in which the ingredients (i), (ii), (iii) and (iv) are distributed. The method for dyeing hair can obtain better coloration, more uniform and stable color, and not generate adverse effect to the cosmetic performance of the keratinous fibers. |