Bleaching and dyeing; fluid treatment and chemical modification – Dyeing involving animal-derived natural fiber material ,... – Hair dyeing
Patent
1995-06-07
1997-05-13
Lieberman, Paul
Bleaching and dyeing; fluid treatment and chemical modification
Dyeing involving animal-derived natural fiber material ,...
Hair dyeing
8408, 8410, 8414, 8415, 8424, 8623, 8624, 8629, A61K 713
Patent
active
056287992
ABSTRACT:
A process for dyeing hair by preparing and applying to the hair an aqueous reaction medium comprising a dopa species, a reactive direct dye and an oxidant, said aqueous reaction medium optionally containing at least one hair dyeing agent selected from the group consisting of primary intermediates and couplers and also containing a buffer to maintain the pH in the range from 6 to 10 during the reaction, and removing said aqueous reaction medium from the hair within about one hour following its preparation.
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Prota Giuseppe
Wenke Gottfried
Clairol Incorporated
Dusheck Caroline L.
Lieberman Paul
Zeller Charles J.
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