POSITIVELY CHARGED TONER, ELECTROSTATIC CHARGE IMAGE DEVELOPER, TONER CARTRIDGE, IMAGE FORMING METHOD, AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide positively-charged toner which is charged with positive charges, to prevent fogging.SOLUTION: Positively charged toner comprises a toner base particle containing a binder resin having at least an ethylenically unsaturated bond. After mixing toner with methyl ethyl ketone, ion-exchanged water is added. Amine number of a component extracted in an aqueous phase is 600-1,250 mgKOH/g. A weight average molecular weight of the component extracted in the aqueous phase is 1,000 to 200,000.