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Red Hair Coloring Composition Patented by Zotos

Published November 30, -0001
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U.S. Patent No. 7,527,653 B2; Zotos International, Darien, CT, has patented a composition for coloring keratinaceous fibers with a vivid red color. The composition is comprised of a combination of 2,4,5,6-tetraaminopyrimidine sulfate and 2,6-bis(2-hydroxyethylamino)toluene with both dyes having a total combined concentration ranging from 1.10-5% by weight based upon the weight of the entire composition.

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