The present invention is directed to a hair colouring method by using a composition and to said composition comprising a specified ring-fused heterocycle direct dyestuff having the general formula (1) or a salt thereof wherein the formulas are as defined in the patent claims.
Furthermore, the present invention is also directed to the composition. This composition has a surprisingly good hair colouring performance and compatibility with peroxides. The use of this composition leads to long lasting brilliant colours wherein the colour is stable against washing of the hair and environmental influences.
本发明涉及一种使用组合物的染发方法,所述组合物包含具有通式(1)的特定环融杂环
直接染料或其盐,其中的通式如专利权利要求书中所定义。
此外,本发明还涉及该组合物。这种组合物具有令人惊讶的良好染发性能和与过氧化物的相容性。使用这种组合物可以获得持久艳丽的发色,而且发色稳定,不受头发洗涤和环境影响。