Patent ID: 6686112
Filing Date: 2004-02-03
Classification: G03G

Abstract:
A dry toner for electrophotography comprising:colored resin particles obtained by hot-kneading and grinding of a binder resin, a releasing agent and a coloring agent, with releasing agent particles dispersed in a binder resin, wherein the releasing agent particles dispersed in each colored resin particle have a particle diameter distribution such that the particle diameter of releasing agent particles dispersed in the vicinity of the surface of each colored resin particle is larger than the particle diameter of all releasing agent particles at a central site of the colored resin particle, and the colored resin particles have an average particle diameter of 3 &mgr;m to 10 &mgr;m and a circularity of 0.93 to 0.99, and the releasing agent particles dispersed in the vicinity of the surface of each colored resin particle have a particle diameter of 0.05 &mgr;m to 0.3 &mgr;m.