| abstract |
Agent for bleaching human hair, each based on their weight - 0.001 to 10 wt .-% of one or more oxidation dye precursors and / or direct dyes, and 0.05 to 5 wt .-% of at least one cyanate of the formula M + [OCN] - in which M + is K + , Na + , Li + or NH 4 + or ½ Ca 2+ , ½ Mg 2+ or ½ Zn 2+ and / or 0.05 to 5% by weight of at least one compound of the formula H 2 NC (O) -L in which L is a group which can be displaced by the anion - OOH, leads to a reduction in the action times and the irritation potential and to an increase in the brilliance of the staining results of these agents. These agents are particularly suitable for staining at acidic pH (pH <7.0). |