Patent ID: 7670744

Claim:
A method for producing toner in an aqueous medium by heating and aggregating a mixture that includes at least a first resin particle dispersion in which first resin particles are dispersed and a pigment particle dispersion in which pigment particles are dispersed, the method comprising steps of: A. adjusting a pH of the mixture of at least the first resin particle dispersion and the pigment particle dispersion in a range of 9.5 to 12.2; B. adding a water-soluble inorganic salt to the mixture; C. heat-treating the mixture so that at least the first resin particles and the pigment particles are aggregated to form aggregated particles, and at least part of the aggregated particles is melted; D. adjusting a pH of the mixture at the time of forming the aggregated particles in a range of 7.0 to 9.5; E. adding a second resin particle dispersion in which second resin particles are dispersed and a wax particle dispersion in which wax is dispersed to an aggregated particle dispersion in which the aggregated particles are dispersed and adjusting a pH of the resultant mixture in a range of 5.2 to 8.8; F. heat-treating the mixture at temperatures not less than a glass transition point of the second resin particles for 0.5 to 2 hours; G. adjusting a pH of the mixture in a range of 3.2 to 6.8; and H. fusing the second resin particles and the wax with the aggregated particles by further heat-treating the mixture at temperatures not less than the glass transition point of the second resin particles for 0.5 to 5 hours, wherein colored particles produced have a finely roughened surface.