Patent ID: 7488354

Claim:
A method for dyeing human keratin fibers comprising applying to the fibers a dyeing composition comprising, in an appropriate cosmetic medium, at least one disulphide dye chosen from the dyes of the following formulae (I), (II), (III) or (IV): their salts, isomers and solvates, in which formulae: A and A′, which are identical or different, are chosen from radicals compositing at least one cationic or noncationic chromophore; V and V′, which are identical or different, are chosen from bridging groups; v and v′, which are identical or different, are 0 or 1; X, which are identical or different, are chosen from saturated or unsaturated, linear or branched C 1 -C 30 hydrocarbon chains optionally interrupted and/or optionally terminated at one or both ends by at least one divalent group, chosen from: —N(R)—, —N + (R)(R)—, —O—, —S—, —CO—, —SO 2 — with R, which are identical or different, being chosen from hydrogen, a C 1 -C 4 alkyl radical, a hydroxyalkyl radical and a aminoalkyl radical; an optionally substituted, saturated or unsaturated, fused or nonfused, aromatic or nonaromatic (hetero)cyclic radical optionally comprising at least one identical or different heteroatom; the coefficient p is equal to 0 or 1; C sat , C′ sat , which are identical or different, are chosen from optionally substituted, optionally cyclic, linear or branched C 1 -C 18 alkylene chains; D is a radical chosen from hydroxyl, hydroxyalkyl, alkoxy, carboxyl, carboxylate, amino, alkylamino and dialkylamino radicals.