Suspicious looking conversion manner of the suspicious looking resin grain and the resin grain, and consists of the suspicious looking resin grain the toner null for the electrophotography

摘要

PURPOSE: To provide a method for deforming a resin particle by surface reforming to uniformly reform the surface of the particle and to unnecessitate the separating operation of an unstuck fine particle. CONSTITUTION: In water system, a monomer is polymerized on the surface of a main particle in the presence of the main particle, the polymerizing monomer, a dispersant, which has a skeleton of the polymerizing monomer and a hydrophobic group, and a water soluble polymerization initiator in the pH zone to be |(zeta potential of main particle)|=20mV and |(zeta potential of dispersant)|-|(zeta potential of main particle)|}=10mV.