| abstract |
The subject of the invention is a composition for dyeing keratinous fibers, and in particular human keratinous fibers such as the hair, comprising at least one diamino-N, N-dihydropyrazolone derivative, as oxidation base and a process implementing it. It also relates to amino-N, N-dihydropyrazolone derivatives or one of its addition salts as well as diamino-NN-dihydropyrazolone derivatives or an addition salt thereof and to obtain them. .n n n The present invention makes it possible in particular to obtain keratinous fiber staining, which is stubborn, resistant to light and to washing. |