Hair dye composition, especially for use on grey hair, contains an indigo-derived indican preparation and a glucosidase enzyme preparation so as to produce indirubin,

摘要

A hair dye composition which produces indirubin comprises: (a) a preparation comprising mainly indican derived from indigo; and (b) a preparation comprising mainly the enzyme beta -glucosidase, The composition is free of saponin or saponin-containing materials or contains at most 0.1 wt.% of such components.