ELECTROPHOTOGRAPHIC TONER AND ITS MANUFACTURE

摘要

PROBLEM TO BE SOLVED: To provide the electrostatic toner manufactured by a wet granulation process using fine inorganic grains as a dispersion stabilizer which is not buried into a spent or the toner and superior in printing property over a long period. SOLUTION: This electrophotographic toner is obtained by dispersing a colored resin composed at least of a binder resin and a colorant into an aqueous dispersion medium with a dispersion stabilizer, and this dispersion stabilizer comprises 2 kinds of fine inorganic grains A and B different from each other in grain diameter. The inorganic grains B having a BET specific surface area BBET of 30-120 m2/g and the inorganic grains A having a BET specific surface area ABET satisfy the following expression: 2<=ABET/BBET<=10.