DYESTUFF COMPOSITIONS, THEIR PREPARATION AND USE

摘要

New dyestuff compositions of triphenylmethane dyestuffs containing no sulfo group, have been found which contain 5 to 60% of said triphenylmethane dyestuff and 40 to 95% of an oxidatively drying varnish on the basis of unsaturated compounds, of a physically drying varnish on the basis of dissolved hard resins, of a varnish which is drying by the cross-linking of low-moleuclar-weight unsaturated compounds to yield high-molecular-weight films under the action of high-energy radiation, or of a varnish prepared using conventional further additives, or of their mixtures, and optionally additional conventional dyestuff pigments, which compositions are well suited for the brightening and shading of black printing inks and pastes containing soot and do not show disturbing viscosity and thixotropy effects as often usual similar pigment compositions do.