Patent ID: 6835210
Filing Date: 2004-12-28
Classification: A45D,A61K,A61Q,Y10S

Abstract:
A method of electrochemically dyeing hair comprising the steps of:i) applying to the hair an oxidative dye precursor mixture containing at least one primary intermediate having a standard Redox potential less than about 1 volt, ii) contacting the oxidative dye precursor mixture on the hair with an electrode system that provides sufficient voltage to electrochemically oxidize the at least one primary intermediate to produce a reactive intermediate that generates colored dye through a coupling reaction with an oxidative dye precursor present in the mixture, wherein the reactive intermediate is a quinone monoimine, a quinone diimine, a substituted quinone mono- a substituted quinone diimine, an indole imine, a substituted indole imine, or mixtures thereof.