Developing process using toners at a reactor product between a dye having an amino group and organic halide

Claim 1

A process for developing electrostatic latent images by contacting a surface having an electrostatic latent image thereon with a developer prepared by dispersing a toner for electrophotography into a petroleum liquid having an electric resistance large enough so not to destroy the electrostatic latent image, the toner being a solid or liquid compound produced by the reaction of an acid halide selected from the group consisting of aliphatic acid halides having more than five carbon atoms and aromatic acid halides having more than five carbon atoms and a dye selected from the group consisting of quinoneimine dyes, the reaction being carried out by first mixing the acid halide and the dye at a temperature in the range from about 0* to 10*C, and thereafter reacting the mixture at a temperature in the range from aboUt 90* to 150*C, the weight ratio of acid halide to dye being in the range from about 1:1 to 8:1, and after said contacting step, removing the petroleum dispersing liquid from the surface.