CARRIER FOR DEVELOPING ELECTROSTATIC CHARGE IMAGE, ITS PRODUCTION AND TWO-COMPONENT DEVELOPER

摘要

PROBLEM TO BE SOLVED: To obtain a resin dispersion type carrier excellent in shock resistance, capable of easily controlling magnetization and not causing sticking and to obtain a two-component developer using the carrier. SOLUTION: When magnetic fine particles are dispersed in at least a bonding resin to obtain a carrier for developing an electrostatic charge image, nonmagnetic fine particles having 15-40g/100g oil absorption and 0.1-1.0μm number average primary particle diameter are incorporated into the carrier and the weight ratio of the magnetic fine particles to the nonmagnetic fine particles is regulated to 4:1 to 1:4.