Use of soluble latent pigments that can be chemically, thermally or photochemically converted to insoluble pigments to dye keratinic fibers, especially human hair

摘要

Soluble latent pigments that can be chemically, thermally or photochemically converted to water-insoluble pigments in keratinic fibers are used to dye keratinic fibers. Independent claims are also included for: (1) dyeing keratinic fibers by applying a composition comprising one or more latent pigments as above, allowing the composition to act for 1-60 minutes, optionally rinsing the fibers, and thermally, chemically or photochemically treating the latent pigment(s); (2) cosmetic composition comprising at least one latent pigment as above and at least one compound selected from mono- or polyhydric alcohols, acidifying agents and surfactants; (3) kit for dyeing keratinic fibers, comprising one compartment containing at least one latent pigment as above and another compartment containing a chemical agent capable of converting the latent pigment to a sparingly soluble compound.