Pigment passivation via polymer encapsulation

摘要

The range of differences in the triboelectric characteristics of various colored electrophotographic toners comprising pigments of different colors and having different triboelectric characteristics is narrowed by electrically passivating pigment particles with a continuous polymer coating on the surfaces of the pigment particles and dispersing the so-coated particles in a binder resin, which is subsequently pulverized to form toner particles.