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Permanent Hair Color Developed by Unilever



Published November 22, 2005
Related Searches: patent color hair care
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Patent No. US 6,821,302 B2: Unilever Home & Personal Care USA, a division of Conopco, Inc., Chicago, patented a permanent hair colorant using carbonate salts and bicarbonate salts, as well as percarbamic acid precursors.


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