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

To provide an external additive for toner that controls fogging occurring during continuous output.SOLUTION: An external additive for toner includes a hydrophobic-processed surface, and has an average primary particle diameter of 10 nm or more and 100 nm or less and a volume specific resistivity R1 of 11 or more and 14 or less in terms of a common logarithm value logR1.SELECTED DRAWING: None