Dye composition, useful for coloring of human keratin fiber, preferably hair, comprises direct acid dye e.g. direct azo dyes and anthraquinone, and substituted thiol compounds e.g. thioglycolic acid, and cysteine, in medium

摘要

Dye composition comprises (i) one or more direct acid dye and (ii) one or more substituted thiol compounds (I), in a medium. Dye composition comprises (i) one or more direct acid dye and (ii) one or more substituted thiol compounds of formula (HS-A-COOX) (I), in a medium. X : H, alkali ion, an alkaline ion or an ion derived from organic acids; and A : 1-6C alkylene radical, optionally caring an amino group, and methylcarbonylamino group. An independent claim is included for a device comprising more compartment, in which one of the compartment comprises a primary composition comprising one or more direct acid dye, and an another compartment comprises a second composition comprising (I).