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L’Oréal Patents Dye Composition

Published December 4, 2007
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Patent No. US 7,288,121 B2:
A composition comprising at least one mixed dye comprising at least one chromophore chosen from compounds of the methine family and/or the carbonyl family dying process and kit and mixed dyes has been patented by L’Oréal S.A. Paris, France.

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