Patent ID: 7981587
Filing Date: 2011-07-19
Classification: G03G

Abstract:
1. A method for producing a developing agent comprising the steps of: heating a dispersion of a toner particle material containing a binder resin fine particle, a coloring agent particle and a dispersion medium at a temperature of a glass transition point of the binder resin or higher and adding a coagulating agent consisting of a water-soluble inorganic metal salt in which the metal is a monovalent or divalnet in the heated dispersion of the toner particle material at a temperature of a glass transition point of the binder resin or higher to coagulate the toner material containing the binder resin fine particle and the coloring agent particle to obtain-a coagulated particle; fusing the obtained coagulated particle; and removing the dispersion medium from the dispersion containing the coagulated particle to obtain a toner particle.