Hair dye composition having a particular buffer capacity and containing an alkylene carbonate
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United States of America Patent
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Jun 19, 2001
Grant Date -
N/A
app pub date -
Jul 2, 1999
filing date -
Oct 12, 1998
priority date (Note) -
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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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