| abstract |
Dyes of the formula in the F for a (m + n) -valent radical of a quinophthalone, dioxazine, indigo, quinacridone, triphenylmethane or rhodamine dye, M⊖ for H⊕ or an equivalent of a metal cation, m for 0, 1 or 2 and n stand for 1, 2, 3 or 4.n n n The dyes and their salts are very suitable for dyeing and printing paper. Mass dyeing gives practically colorless waste water. The dyeings obtained have high lightfastness and high fastness to bleeding. |