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MULTI-STEP PROCESS FOR DYEING KERATIN FIBRES USING INDIGO-PRODUCING PLANT POWDER, AND FOR ALKALINE DYE TREATMENT
MULTI-STEP PROCESS FOR DYEING KERATIN FIBRES USING INDIGO-PRODUCING PLANT POWDER, AND FOR ALKALINE DYE TREATMENT
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机译：用靛蓝生产的植物粉对角蛋白纤维进行染色的多步工艺以及碱性染料的处理
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摘要
The invention relates to (I) a process for dyeing keratin fibres, in particular human keratin fibres such as the hair, in which said fibres are treated in several steps, comprising at least one step E1) of dyeing said fibres using a cosmetic dye composition A comprising indigo- producing plant powder i) and optionally henna ii); at least one step E2) of post-treatment of said fibres using an aqueous cosmetic composition B whose pH is greater than 5, preferably greater than 7, comprising one or more alkaline agents iii) and one or more particular natural dyes; it being understood that, preferably, composition A is applied first to the keratin fibres; and that composition B is applied to the keratin fibres after the application of composition A, and (II) to the use of an aqueous composition B comprising one or more particular alkaline agents iii) and at least one particular natural dye, for accelerating the stabilization over time of the colour of fibres dyed with indigo-producing plant powder and/or extract and optionally henna and for improving the colour intensity and/or colour buildup and/or colour persistence.
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