Patent ID: 8551189
Filing Date: 2013-10-08
Classification: A61K,A61Q

Abstract:
1. A process for dyeing keratin fibres, comprising treating the fibres with: i) at least one 1,8-dihydroxynaphthalene derivative of formula (I): inorganic or organic acids or bases, optical isomers, geometric isomers, tautomers, and/or solvates thereof, wherein: R R R R with R and R′, which may be identical or different, representing a hydrogen atom or a C and ii) at least one basifying agent other than aqueous ammonia; wherein: the at least one 1,8-dihydroxynaphthalene derivative of formula (I) and the at least one basifying agent can be applied simultaneously or successively to the keratin fibers, and wherein the dyeing process does not involve aqueous ammonia.