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L’Oréal Earns Hair Dyeing Patent



Published November 11, 2005
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Patent No. US 6,423,100 B1: L’Oréal Paris SA researchers patented a ready-to-use composition for the oxidation dyeing of hair that contains at least one benzene self-oxidizing dye, at least one enzyme chosen from 2-electron oxidoreductases and at least one donor.


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