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Hair Dye Lotion Patented By Procter & Gamble



Published November 22, 2005
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Patent No. US 6,764,523 B2: Connect-icut-based researchers for The Procter & Gamble (P&G) Company, Cincinnati, OH, patented a highly aqueous dye lotion for use in a two-part oxidative hair dye. The lotion contains water, at least one primary dye intermediate, at least one coupler and a hydroxypropyl bisisostearamidopropyldimonium chloride conditioner.


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