abstract |
mediumnto dyenand / or lightening keratinic fibers, especially human hair,nwhich, based on their weight 0.05 to 10 wt .-% valine and 0.01nup to 10% by weight of chitosan and / or chitosan derivative (s)nwith particular advantage in hair dyeing and whitening agentsnwork in and lead tona reduction of the irritation potential of these agents. |