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Coloring and Highlighting

Published November 14, 2005
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Patent No. US 6,596,035 B2: Revlon Consumer Products Corp., New York, NY, was awarded a patent for a one-step method to simultaneously color and highlight hair. The process includes combining a powder composition (at least one alkali metal or alkaline earth metal persulfate), an aqueous developer and an aqueous-based colorant, and applying it to the hair for a sufficient period of time.

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