Patent ID: 8038731
Filing Date: 2011-10-18
Classification: A61K,A61Q,C09B

Abstract:
1. A method of coloring dark keratin fibers, possessing a tone level of less than or equal to 6, comprising applying to said dark keratin fibers a dyeing composition comprising, in an appropriate cosmetic medium, at least one fluorescent disulphide entity and simultaneously applying to the dark keratin fibers at least one reducing agent, wherein the at least one fluorescent disulphide entity is selected from the entities of formula (I): the organic and inorganic acid salts, optical isomers and geometrical isomers, and the solvates thereof; wherein: A and A′, which are identical, each represent a radical containing at least one non-cationic fluorescent chromophore; X and X′, which are identical or different, each represent a saturated or unsaturated, linear or branched C p and p′, which are identical or different, are each 0 or 1; C