Patent ID: 7951519
Filing Date: 2011-05-31
Classification: G03G

Abstract:
1. A toner for development of an electrostatic image, comprising at least a crystalline polyester resin and a colorant, the toner showing a dielectric loss index ∈″ of 0.05 or less at 0.1 Hz and 500 V at 30° C. and 90% RH, the toner showing the dielectric loss index ∈″ is obtained by: mixing a resin particle dispersion liquid in which binder resin particles including the crystalline polyester resin are dispersed and a colorant dispersion liquid in which the colorant is dispersed, to form a mixture; adding an aggregation agent to the mixture to form aggregated particles; heating the aggregated particles to a temperature in the range of the melting point of the crystalline polyester resin ±about 5° C.; and adding an acid and a surfactant to fuse and coalesce the aggregated particles.