Patent ID: 6528220
Filing Date: 2003-03-04
Classification: G03G

Abstract:
An electrophotographic color toner containing at least a coloring agent and a binder resin, wherein the dynamic complex elastic modulus G* (distortion ratio 100%, frequency 10 rad/sec.) of the toner measured at a temperature at which the dynamic complex elastic modulus G*1 (distortion ratio 100%, frequency 10 rad/sec.) of said binder resin becomes 1000 Pa is from 3000 to 50,000 Pa; wherein the color toner further comprises light-color or colorless fine particles that are organic or inorganic and have an average primary particle size of 1 to 500 nm, wherein the organic fine particles have substantially no crosslinked structure and have a glass transition temperature of at least 130Â° C., and wherein the fine particles are dispersed uniformly in the toner particles.