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Oxidation Hair Dye Patented by Shiseido

May 2, 2014

US Patent No. 8,657,888 B2; Shiseido Company, Ltd., Chuo-ku, Tokyo, has patented an hair dye composition consisting of a first formulation containing an oxidation dye and a second formulation containing an oxidation agent, which is the composition of two formulations that are mixed before use. The first formulation and/or the second formulation contains acetylated hyaluronic acid or salts thereof and the pH of a mixture of the first formulation and the second formulation in the same weight is 8 to 9.
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