Process and kit for dyeing hair

A - Human Necessities – 61 – K

Patent

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Details

A61K 8/19 (2006.01) A61K 8/44 (2006.01) A61K 8/49 (2006.01) A61Q 5/10 (2006.01) A61K 7/13 (1990.01)

Patent

CA 2136459

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 during the reaction, and removing said aqueous reaction medium from the hair within about one hour following its preparation.

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