Hair colouring compositions

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专利权人:

发明人:

申请号：

EP14199499.6

公开号：

EP3034067A1

申请日:

2014.12.19

申请国别(地区):

EP

年份:

2016

代理人:

摘要：

The invention provides a method for the non-oxidative (direct) coloration of hair, the method comprising the step of topically applying a direct dye to the hair in the presence of dihydroxyacetone the direct dye having a nitrobenzene chromophore and at least one primary amine (-NH2) group.The presence of dihydroxyacetone increases the direct dye substantivity and resistance to wash off.

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