TONER AND ELECTROPHOTOGRAPHIC DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a toner which achieves longer lasting developing characteristics, ensures fixability with high anti-offsetting property without using oil in fixation, acts properly in an electrophotographic method using a group of image forming units, obtained by circularly arranging plural movable image forming units forming toner images different from one another in color in such a way that the overall image forming units rotate, ensures high density, low surface fogging and high transfer efficiency and will not cause untransfer. SOLUTION: A polyester resin-base bonding resin is used and an inorganic fine powder, having two or more positive charge type hydrophobic silica powders different from each other in particle diameter is added as external additives.