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Mitsubishi Patents New Hair Dye

Published December 9, 2005
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Patent No. U.S. 6,905,521 B2: Mitsubishi Pencil Kabushiki Kaisha, Tokyo, Japan, earned a patent for a cumulative hair-dyeing composition comprising an acid dye as a colorant, a nonionic or anionic silicone base resin, a hair-dyeing aid, alcohol and water.

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