Patent ID: 8546053
Filing Date: 2013-10-01
Classification: G03G

Abstract:
1. A method for producing a toner which comprises toner base particles containing at least a colorant, a binder resin and a wax, the method comprising: heating a wax in an organic solvent to obtain a solution or dispersion of the wax in the organic solvent; cooling the organic solvent solution or dispersion to prepare a wax dispersion liquid having wax particles; adding a colorant and a binder resin to the wax dispersion liquid to obtain an oil phase; adding an aqueous phase containing resin fine particles to the oil phase; mixing the oil phase and the aqueous phase; and removing the solvent to obtain the toner base particles; wherein the cooling of the organic solvent solution or dispersion is conducted in a container so that a standard deviation σ of a temperature distribution between a center portion of the container and an inner wall of the container is 0.5 or less and a cooling rate is 2.0° C./min or more.