Patent ID: 8343704
Filing Date: 2013-01-01
Classification: G03G

Abstract:
1. A method of producing a toner, the method comprising the steps of: forming an emulsion having: liquid droplets containing a resin with an acid group, a first solvent which is hydrophobic and in which the resin is dissoluble, a colorant, and a charge control agent which is positively charged; and an aqueous dispersion medium which disperses the liquid droplets; forming solid particles by removing the first solvent from the liquid droplets in the emulsion to solidify the liquid droplets; and washing the solid particles having the charge control agent with a second solvent in which the charge control agent is dissoluble and the resin is insoluble; and further comprising washing the solid particles with an acid after the step of forming the solid particles and before the step of washing the solid particles with the second solvent; wherein the second solvent is an alcohol having a number of carbon or carbons of 1 to 3 ; and further comprising setting a weight ratio of the second solvent to the charge control agent to not less than 150 and not more than 1,000, except when a solubility of the charge control agent to the second solvent is less than 1, setting the weight ratio of the second solvent to the charge control agent to not less than 500 to not more than 1,000.