Patent attributes
A toner for developing an electrostatic image, comprising, a binder resin, a colorant, a charge control agent, and a parting agent, and wherein: a volume average particle diameter (Dv) of toner particles is 3 to 10 μm; a ratio (Dv/Dp) of Dv to a number average particle diameter (Dp) is 1 to 1.3; an average circle degree is 0.93 to 0.995; and location parameter of island-shaped separate phase is 25 number % or more, wherein the location parameter is the percentage of such sectional photo image of toner particles where a maximum diameter of island-shaped separate phase is 1 μm or more and an outermost portion of said island-shaped separate phase is present at the depth of 0.01 to 0.15 time of the particle diameter of each toner particle under the surface.
