Kao Corporation

Nozomi Nagashima

Hajime Miyabe

Masahiko Sakai

Kazuhisa Fukuhara

Kenichi Ueyama

Yutaka Shibata

Atsushi Nakashimada

A leave-on hair cosmetic composition, which contains the following components (A), (B) and (C): wherein the cosmetic composition has a pH of from 2 to 5 at 25&#xb0; C. when diluted to 20 times the weight with water. The present invention also relates to a hair quality improving method which includes treating the hair with the hair cosmetic composition. The hair cosmetic composition of the present invention can provide benefits such as luster, manageability, pliability and elasticity to the hair which is apt to be dry, having lost water therefrom owing to damage by coloring, permanent waving, or repetitive excessive blow drying.

Hair cosmetic composition

The invention relates to a hair dye composition comprising (A) an acid dye and (B) an alkylene carbonate having 3-5 carbon atoms in total, said composition exhibiting a pH of 2-6, and having a buffer capacity of 0.007-0.5 gram equivalent/L, and to a method of dyeing hair using the hair dye composition. The hair dye composition is excellent in hair-dyeing ability without coloring the scalp and skin and has good fastness to shampoo and the like.

Hair dye composition having a particular buffer capacity and containing an alkylene carbonate

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Tokyo, Japan

Nozomi Nagashima