Hair colouring method employing a chromene or chroman dye, a particular organic compound, an oxidizing agent, an alkaline agent and a metal salt
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United States of America Patent
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Jun 12, 2018
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app pub date -
Dec 27, 2013
filing date -
Dec 27, 2012
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Abstract
The present invention relates to a method for coloring keratin fibers, comprising: —a first step of applying to the fibers a dyeing composition (a) comprising one or more dyes chosen from chromene dyes and chroman dyes, and one or more liquid organic compounds having a Hansen so lubility parameter δH of less than or equal to 16 Mpa1/2, then —a second step of applying to the fibers an oxidizing composition (b) comprising one or more oxidizing agents and one or more alkaline agents, one or more metal salts and/or metal oxides being present in at least one of the compositions (a) and (b), and/or being applied during an additional step by means of a composition (c). The invention likewise relates to a kit suitable for implementing this method.
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