Hair treatment methods
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United States of America Patent
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Oct 2, 2012
Grant Date -
Aug 4, 2011
app pub date -
Sep 10, 2009
filing date -
Sep 16, 2008
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Abstract
A method of colouring a material, the method comprising the steps of: a)applying to the material a composition comprising a sulphur-containing nucleophile; and b)applying to the material a composition comprising a dye compound selected from a dye class other than the class of reactive dyes.
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