Two-stage process for dyeing keratin fibres and composition for

Details Two-stage process for dyeing keratin fibres and composition for Two-stage process for dyeing keratin fibres and composition for

1979-04-05

1986-01-28

Ore, Dale R.

Bleaching and dyeing; fluid treatment and chemical modification

Dyeing involving animal-derived natural fiber material ,...

Hair dyeing

8408, 8409, 8410, 8411, 8412, 8478, 8529, 8638, 132 7, A45D 700, A61K 713, D06P 500

Patent

active

045668752

ABSTRACT:
A two-stage process for dyeing keratin fibres, especially human hair, which comprises applying a first composition containing at least one mercaptan present in a concentration insufficient to causes degradation of the hair and subsequently without intermediate rinsing, applying an oxidising composition so as to develop the dyestuff, and optionally one or more couplers, which is applied to the fibres, the dyestuff being an oxidative dyestuff precursor of the para type, a diphenylamine, a polyhydroxybenzene, a polyhydroxynaphthalene, a polyaminobenzene, a polyaminophenol or a polyaminopolyhydroxybenzene is described and compositions for use therein.

REFERENCES:
patent: 2101696 (1935-12-01), Wagner et al.

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