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

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

1987-01-20

1989-02-28

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

048081906

ABSTRACT:
The invention relates to a process for dyeing keratinous fibers characterized in that at least one composition comprising, in a medium suitable for dyeing, 5,6-dihydroxyindole in combination with hydrogen peroxide at a pH of between 2 and 7 is applied to these fibers, the application of said composition being preceded or followed by the application of a composition comprising iodide ions in a medium suitable for dyeing.

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

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