Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Patent
1989-10-06
1990-11-20
Lieberman, Paul
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
8425, 8428, 8429, 8623, 8624, A61K 713
Patent
active
049715968
ABSTRACT:
Process for dyeing human keratinous fibres, characterized in that there are applied on these fibres, in separate stages, a composition (A) containing a metal salt chosen from copper, iron, cobalt, magnesium, and silver salts, or mixtures thereof, in a cosmetically acceptable medium, and, before or after the application of the composition (A), a composition (B) containing, in a cosmetically acceptable medium, at least one dye corresponding to the formulae: ##STR1## in which formulae R.sub.1 denotes hydrogen or hydroxy, R.sub.2 and r.sub.3 denote hydrogen, alkyl, alkoxy; R.sub.4 denotes hydrogen, hydroxy, alkoxy, alkyl, chlorine; R.sub.5 denotes hydrogen, chlorine, alkoxy, hydroxy; and R.sub.6, R.sub.7 and R.sub.8 denote hydrogen or hydroxy.
REFERENCES:
patent: 2338745 (1944-01-01), Van Riper et al.
patent: 4601726 (1986-07-01), Grollier et al.
patent: 4867751 (1989-09-01), Lang et al.
patent: 4888026 (1989-12-01), Lang et al.
patent: 4895575 (1990-01-01), Hocquaux et al.
Chemical Abstracts, vol. 77, No. 10, 9/4/72, p. 285, Abstract No. 66107m.
"L'Oreal"
Lieberman Paul
Skane Christine A.
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