Hair treatment method
AssigneeKao Corporation
InventorAyami Nagayama
Life of this patent
Estimating the term…
Abstract
The present invention relates to a hair treatment method including the following step (i) and step (ii) in this order: Step (i): a step of applying a composition containing the following component (A) on a hair: (A) a compound represented by the following general formula (1) or a salt thereof: wherein a broken line represents the presence or absence of a π bond; R1 represents a hydroxy group or an acetoxy group; R2 represents a hydrogen atom or —COOR (R is a hydrogen atom, a methyl group, or an ethyl group); and R3 represents a hydrogen atom, an acetyl group, a methyl group, or an ethyl group; and Step (ii): a step of giving a shape to the hair while applying a temperature of 140° C. or higher and 220° C. or lower to the hair.
Claims11
A method for treating hair, comprising (i) and (ii) in this order:
- (i) applying a composition comprising from 0.02% by mass to 5% by mass of 5,6-dihydroxyindole or a salt thereof;
- (ii) giving a shape to the hair while applying a temperature of from 140° C. to 220° C. to the hair,
- wherein a pH of the composition is from 8.0 to 12.0, and
- wherein the method does not comprise applying to the hair a hair treatment agent comprising a reducing agent or a hair treatment agent having a pH of more than 12.
Dependencies are inferred from the claim text.