The invention relates to a composition containing a pyrazine derivative and to the use of said derivative as an optical bleach and/or dye in a direct or oxidation dyeing composition for keratin fibres, particularly human keratin fibres and, more specifically, hair. The invention also relates to the methods using said compositions.
本发明涉及一种含有
吡嗪衍
生物的组合物,以及将上述衍
生物用作角蛋白纤维,尤其是人类角蛋白纤维,更具体地说是头发的直接或氧化染色组合物中的光学漂白剂和/或
染料。本发明还涉及使用所述组合物的方法。