Dyeing process employing indole dyes and oxidation dye precursor

Details Dyeing process employing indole dyes and oxidation dye precursor Dyeing process employing indole dyes and oxidation dye precursor

1990-07-20

1991-12-17

Lieberman, Paul

Bleaching and dyeing; fluid treatment and chemical modification

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

Hair dyeing

8408, 8409, 8410, 8415, 8416, 8423, 8429, A61K 713

Patent

active

050731742

ABSTRACT:
A process for dyeing keratinous fibers comprises a two-step operation in which in the first step the fibers are contacted with an indole dye in a medium suitable for dyeing the fibers, the medium being free from any oxidation catalyst and oxidation catalyst. Thereafter, in the second step the fibers are contacted with a para type oxidation dye precursor in a medium which is also suitable for dyeing the fibers and is free from any oxidation catalyst and oxidation agent. A multi-compartment kit housing the indole dye and para type oxidation dye precursor is also provided.

REFERENCES:
patent: 4888027 (1989-12-01), Grollier et al.

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