Abstract: A production method of a toner includes a suspension process in which a polymerizable monomer composition is dispersed in an aqueous dispersion medium; and a polymerization process in which suspension polymerization is performed with the suspension in the presence of a polymerization initiator to obtain colored resin particles. In the suspension process an inhibitor of small diameter microparticle production is contained in the aqueous dispersion medium. A minimum reaction activation energy Emin of the inhibitor of small diameter microparticle production is 7 kcal/mol or less and an octanol-water partition coefficient log P is 2 or less.

Abstract: The present invention is to provide a method of producing a toner for developing an electrostatic image, in which less small diameter microparticles are produced as a by-product in polymerization of toner so that washing is easy leading to excellent productivity, and shelf stability at high temperature (preventing aggregation of the toner during storage) is excellent. Also, the present invention is to provide a method of producing a toner for developing an electrostatic image, in which residual amounts of a degradation product of a polymerization initiator and so on remained in the toner are reduced so that less odor is produced leading to no environmental deterioration, and a shelf stability at high temperature is excellent.