Patent ID: 7338535
Filing Date: 2008-03-04
Classification: A61K,A61Q

Abstract:
1. A rapid dyeing process for human keratin fibers, comprising applying to the human keratin fibers at least one dye composition comprising, in a medium suitable for dyeing, at least one direct dye chosen from the following dyes: the triaminotriphenylmethane compounds of formula (I): wherein: R R the diaminotriphenylmethane compounds of formula (II) wherein: R R R the triaminonaphthyldiphenylmethane compounds of formula (III) wherein: R R the monoaminotriphenylmethane compounds of formula (IV) wherein: R R the methine and azomethine dyes of formula (VI): wherein: R W is a CH group, y is the integer 0, wherein either W or R R R R maintaining the at least one dye composition in contact with said keratin fibers for a leave-in time of less than 5 minutes; and rinsing the treated keratin fibers, wherein the resulting coloration has, according to the CIELAB notation, an L* value of less than 40 and a C* value of greater than 20, when the at least one dye composition is applied to natural hair containing 90% white hairs, at a temperature of 27° C.±5° C. for a period of 4 minutes, for a bath ratio of 10.