EXTERNAL ADDITIVE FOR TONER, TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, PROCESS CARTRIDGE, IMAGE FORMING APPARATUS, AND IMAGE FORMING METHOD

摘要

PROBLEM TO BE SOLVED: To provide an external additive for toner that suppresses excessive charging (charge-up) of toner particles.SOLUTION: There is provided an external additive for toner comprising particles including a polyimide resin having a repeating unit represented by the following general formula (1), and a metal oxide including a metal having a valency of 2 or more (in general formula (1), X represents a tetravalent organic group having two or more carbon atoms, and Y represents a divalent organic group having two or more carbon atoms.).SELECTED DRAWING: None