Hair dye composition having a particular buffer capacity and containing an alkylene carbonate
First Claim
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1. A hair dye composition which comprises (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.
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Abstract
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.
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Citations
16 Claims
- 1. A hair dye composition which comprises (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.
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5. A method of dyeing hair which comprises applying to hair 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;
- subsequently allowing the hair to stand; and
washing the hair by use of a shampoo. - View Dependent Claims (6, 7, 8, 13, 14, 15, 16)
- subsequently allowing the hair to stand; and
Specification