Compositions used in permanent alteration of hair color

Drug – bio-affecting and body treating compositions – Bleach for live hair or skin

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424 70, A61K 712

Patent

active

047755270

ABSTRACT:
A permanent hair color altering composition comprising an aqueous preparation on the basis of melanin dissolution and/or oxidation of a hair colorant dye intermediate, which contains as a swelling and penetration agent, an N-alkyl pyrrolidone wherein the alkyl group contains between 8 and 22 carbon atoms.

REFERENCES:
patent: 3190803 (1965-06-01), Vogt
patent: 3726967 (1973-04-01), Uorsatz et al.

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