Process for dyeing keratinous fibres with 5,6-dihydroxy-indole c

Details Process for dyeing keratinous fibres with 5,6-dihydroxy-indole c Process for dyeing keratinous fibres with 5,6-dihydroxy-indole c

1987-01-20

1989-02-14

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

8406, 8634, A61K 713

Patent

active

048043850

ABSTRACT:
The invention relates to a plural stage process for dyeing keratinous fibers wherein a composition (A) comprising, in a medium suitable for dyeing, 5,6-dihydroxyindole and iodide ions, is applied to the hair, the application of said composition (A) being preceded or followed by the application of a composition (B) comprising hydrogen peroxide.

REFERENCES:
patent: 1677508 (1928-07-01), Windgradoff et al.
patent: 2934396 (1960-04-01), Charle et al.
patent: 4208183 (1980-06-01), Grollier et al.

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