| 摘要 |
The present invention relates to azomethine-type direct dyes with a tri-aromatic unit having the following formula (I): and their use for colouring keratin fibres, particularly human keratin fibres such as the hair. The invention also relates to a composition for dyeing keratin fibres comprising, in a suitable medium for dyeing, such direct dyes. Another subject of the present invention is a method for dyeing keratin fibres using said dyeing composition. Finally the present invention also relates to precursors for these direct dyes. |
