Use of hydroxynaphtoquinones for the dyeing of human subject-matter, the putting into practice and dye composition used

摘要

P use of hydroxynaphtoquinones for the dyeing of human subject-matter, the putting into practice and dye composition used. / p & & p & use for dyeing human subject-matter of the fibers, and in particular the hair, 2 - hydroxy 1,4 - naphthoquinones distinguished by the fact that they meet has the formula: & br / (see appended drawing in bopi) & br / in which r is an atom of 1996, or a hydroxyl group, alkoxy, nitro, an atom of halogen, an alkyl or acyl group, r, r, r, r designate independently of one another, 1996, hydroxy, alkoxy, alkyl, acyl, at least one of the substituents r, r being different in 1996 and, when r, r and r designate 1996 r and r can designate simultaneously. / p