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Use of tetra-azapentamethine compounds as direct dyeing agents and novel tetra-azapentamethine compounds
Use of tetra-azapentamethine compounds as direct dyeing agents and novel tetra-azapentamethine compounds
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机译:四氮杂五甲胺化合物作为直接染料和新型四氮杂五甲胺化合物的用途
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摘要
The invention concerns the use as direct dyeing agent of at least one tetra-azapentamethine compound, a dyeing composition comprising at least such a compound, as well as a method for dyeing keratinous fibers, in particular human keratinous fibers and more particularly hair, which consists in applying at least one composition comprising such a compound. The composition also concerns tetra-azapentamethine compounds of formula (I). The invention further concerns a method for bleaching such compounds, as well as bleaching keratinous fibers previously dyed therewith.
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