Hair colour based on developer coupler system, giving intense permanent colour

摘要

Hair colour based on a developer-coupler system that can be oxidised with peroxide contains: (a) developer(s) selected from 1,4-diaminobenzene, 2,5-diaminotoluene, 2-(2,5-diaminophenyl)-ethanol, 2-(2'-hydroxyethylamino)-5-aminotoluene, N,N-bis-(hydroxyethyl)-1,4-diaminobenzene, 3-(N,N-diethylaminomethyl)-4-hydroxyaniline, 4-aminophenol, 2-chloro-4-aminophenol, 2-amino-5-N,N-diethylaminotoluene, 4-hydroxy-2,5,6-triaminopyrimidine, 4-amino-3-methylphenol and their water-soluble salts; and (b) 1,6-dihydroxynaphthalene (I).