Compositions for the oxidative dyeing of keratin fibers, comprising a medium suitable for dyeing and at least one bicyclic fused 5-5-membered aza heteroaromatic keratin dyeing compound with an N-hydroxy or N-amino group and derivatives thereof. A method for oxidative dyeing of keratin fibers, comprising applying such compositions in the presence of an oxidizing agent, for a period sufficient to develop the desired coloration.
用于氧化染毛角蛋白纤维的组合物,包括适用于染色的介质和至少一种含有N-羟基或N-
氨基基团及其衍
生物的双环融合5-5-成员杂环角蛋白
染料化合物。一种氧化染毛角蛋白纤维的方法,包括在氧化剂存在下应用这样的组合物,以便足够时间发展所需的颜色。