Patent ID: 7112395

Claim:
A color toner comprising at least a binder resin, a colorant, and a releasing agent, wherein: (i) the binder resin contains at least a polyester unit; (ii) a weight average particle diameter of the color toner is greater than 6.5 μm and equal to or less than 11 μm; (iii) an average circularity A of particles in the color toner each having a circle-equivalent diameter of 3 μm or more satisfies a relationship of 0.915≦A≦0.960; (iv) a permeability B (%) of the color toner in a 45 vol % aqueous solution of methanol satisfies a relationship of 10≦B≦70; and (v) an endothermic curve obtained through differential thermal analysis (DSC) measurement of the color toner has one or multiple endothermic peaks in a temperature range of 30 to 200° C., and a temperature Tsc of a highest endothermic peak of the one or multiple endothermic peaks satisfies a relationship of 65° C.<Tsc<105° C., wherein the permeability (%) of light at a wavelength of 600 nm in the dispersion is measured spectrophotometrically based on the following equation: Permeability B (%)= I/I 0 ×100 where I 0 denotes incident luminous flux, and I denotes transmitted luminous flux.