Patent ID: 6042982
Filing Date: 2000-03-28
Classification: G03G

Abstract:
An electrophotographic magnetic carrier having an average particle diameter of 10 to 300 .mu.m and a true specific gravity of 3 to 7, and comprising a composite particle having a two-layered structure, said particle comprising:magnetic particle as a core particle;a coating layer formed on the surface of the magnetic particle, comprising a surface-treating agent having an amino group; andan outer layer formed on the surface of the surface-treating agent layer, comprising an inorganic material and a cured phenol resin, whereinthe ratio (r.sub.b /r.sub.a) of an average radius (r.sub.b) of the core particle to a thickness (r.sub.a) of the outer layer being in the range of 10:1 to 300:1.