Patent ID: 7041142
Filing Date: 2006-05-09
Classification: A61K,A61Q

Abstract:
1. A method of coloring hair comprising the following sequential steps: a) contacting the hair with an aqueous dye precursor mixture comprising: wherein the total weight of the sparingly soluble fatty amine plus the non-amine fatty ingredient in the precursor mixture, ΣFC, and the weight of the organic solvents in the precursor mixture, ΣOS, satisfies the inequality, ΣFC<0.037(ΣOS) wherein the dye precursor mixture does not contain an oxidizing agent, wherein the aqueous dye precursor mixture remains in contact with the hair for a time period of from about 0.5 to 60 minutes before the hair is contacted with the developer and wherein the oxidative hair dye precursor remains substantially inactive during this time period.