COMPOSITION FOR OXIDATIVE COLORATION OF KERATIN FIBERS AND COLORATION METHOD USING THIS COMPOSITION Russian patent published in 2000 - IPC

FIELD: cosmetics. SUBSTANCE: composition for oxidative coloration of keratin fibers, in particular human keratin fibers such as hair is characterized by containing , in coloration appropriate medium, at least one oxidizable base, at least one direct cationic dye depicted by formula A---N= N---B, wherein A is a group selected from groups having structures A1-A3: and B is either group B1: (B1) or nitrogen-containing 4- or 6-membered heterocyclic group containing one or several heteroatoms selected from oxygen and/or sulfur, and/or one or several carbonyl groups, said heterocycles being optionally substituted by one or several radicals selected from C1-C4-alkyls, amino or phenyl groups. Symbols R₁-R₈ and R₁₀-R₁₂, X, Z, L, and M are defined in claim 1 of invention. Composition can be used as direct dye giving coloration with a good brightness. EFFECT: improved coloration quality. 25 cl, 4 ex