| abstract |
Toner powders for developing electrostatic images are provided which contain in epoxy resin organic dye that, although in itself insoluble in the resin, is solubilized therein by one or more substances selected from the group consisting of complete esters and alkyl and aryl amides of o- and m-phthalic acid, carbonic acid, phosphoric acid, benzoic acid and benzenesulfonic acids and condensation products of formaldehyde with alkyl and aryl amides of benzenesulfonic acids. |