Patent ID: 8840684
Filing Date: 2014-09-23
Classification: A45D,A61K,A61Q

Abstract:
1. A process for dyeing keratin fibers, comprising: applying to the fibers at least one cationic direct dye chosen from cationic direct dyes comprising a disulfide function and cationic direct dyes of formula (I) comprising a protected thiol function: and organic acid salts, mineral acid salts, optical isomers, geometric isomers, tautomers and solvates thereof, wherein in formula (I): U is a radical chosen from —S —C′ A and A′, which may be identical or different, are radicals comprising at least one cationic chromophore; X and X′, which may be identical or different, are chosen from linear and branched, saturated and unsaturated divalent C p and p′, which may be identical or different, are chosen from 0 and 1; C applying water vapor to the fibers; wherein the at least one cationic direct dye and the water vapor may be applied together or separately.