Dye composition containing diphenylamine and polyhydroxybenzene

摘要

A dye composition for keratinic fiber and particularly living human hair comprises an admixture of one or more diphenylamines whose corresponding indoamine has an oxidation-reduction potential between -450 and -350 mv and a polyhydroxybenzene having an oxidation-reduction potential between -600 and -300 mv and having the formula <IMAGE> wherein R1 represents hydroxy or <IMAGE> wherein R3 represents hydrogen or alkyl, and R2 represents hydrogen, or NH2 when R1 represents NH2, said diphenylamine and polyhydroxybenzene being present in an amount such that the ratio of the total number of moles of diphenylamine to the number of moles of polyhydroxybenzene is between 2 and 7.