| abstract |
The present invention relates to thiol/disulfide fluorescent dyes comprising intercalated alkylene chains, propyridinium groups and external cationic charges, and to methods of dyeing using such compositions, which are effective on keratinous materials, especially keratin Fibers, especially human keratin fibers such as the hair, have a lightening effect. The present invention similarly relates to novel thiol fluorescent dyes and to their use for lightening keratinous materials. This composition makes it possible to obtain a particularly durable and visible light brightening effect on dark keratin fibers. |