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Stable Aqueous Hair Dye



Published November 14, 2005
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Patent No. US 6,528,045 B1: Goldwell GmbH researchers in Germany were awarded a patent for the preparation of stable, aqueous hair dyeing emulsions, comprising at least one oxidation dyestuff precursor and a water-in-oil emulsion containing at least one nonionic emulsifier, at least one nonionic co-emulsifier, oleic acid and water.


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