Patent ID: 6090517
Filing Date: 2000-07-18
Classification: G03G

Abstract:
A developer for developing an electrostatic latent image comprising a carrier and toner particlesthe carrier comprising magnetic particles coated with a polyolefin resin selected from the group consisting of polyethylene, polypropylene, polybutene, and polybutadiene by surface polymerization, said carrier having a sphericity a of 1.0 to 16.0;wherein said magnetic particles consist essentially of a ferrite consisting of FeO.sub.3 and at least one oxide of an element selected from the group consisting of Li, Be, Na, Mg, K, Ca, and Rb, said oxide being present in a concentration of 10 to 45 mol % based on said ferrite, and the magnetic particles having pores on surfaces thereof, a total volume of said pores being 0.015 to 0.150 cc/g, based on the magnetic particles.