Toner for developing electrostatic image, process for preparation of the same, developer for electrostatic image, and process for forming image

A process for preparation of toner for developing an electrostatic image, the process comprising:

• mixing at least one kind of resin particle dispersion, at least one kind of colorant dispersion, wherein the colorant is a yellow pigment, at least one kind of releasing agent dispersion, and an aggregating agent to form aggregated particles;
• and
• fusing the aggregating particles by heating to a temperature higher than a glass transition point of resin particles in the resin particles dispersion to form toner particles,
• wherein the toner particles exhibit a dispersion state of the colorant particles inside thereof observed by a transmission electron microscope, the state satisfying the following conditions:
• (1) the colorant particles have a dispersion average particle diameter of 100 nm or less;
• and
• (2) a content of coarse colorant particles of a diameter of 400 nm or more 5% by number or less of the total of the colorant particles.