Composition for dyeing keratin fibers, comprising a pyrazoline-4,5-dione and an aromatic primary amine

摘要

The invention concerns a composition for dyeing keratin fibers, in particular human keratin fibers such as hair comprising at least one pyrazolin-4,5-dione of formula (I) and at least one aromatic primary amine. Said composition enables the dyeing of keratin fibers without an oxidizing agent in shades which are strong, varied, resistant and less selective than those of prior art. The invention also concerns dyeing methods and devices using said composition.