Electrophotographic toner

摘要

A toner comprising capsule particles composed of a core and an outer shell wherein the capsule particles have at least a substance capable of forming a radical at the surface thereof, and the capsule particles have adhered on the outer shell a copolymer comprising a hydrophilic vinyl monomer unit and a hydrophobic vinyl monomer unit. The toner exhibits stable chargeablity against environmental changes with a narrow charge distribution.