Patent ID: 7686850
Filing Date: 2010-03-30
Classification: A61K,A61Q,C09B

Abstract:
1. Method of dyeing keratin-containing fibers comprising treating the fiber with at least one sulfide dye of formula (1) their salts, isomers, hydrates and other solvates, wherein R R wherein at least one of the radicals R 1 , R 2 or R 3 is NO 2 ; Y Z or a cationic biradical of a saturated, aromatic or heteroaromatic group; Q X R m is 1 or 2; and U is hydrogen if m is 1; or is a direct bond if m is 2; with the proviso that the method does not comprise contacting hair with an enzyme of the type of a protein disulfidisomerase (EC 5.3.4.1).