Toner for electrophotography with the change controlling agent dispersed therein

A toner for use in electrophotography comprising colorant-embedded thermoplastic resin core particles (A') having an average particle size of from 1 to 15 .mu.m, a charge-controlling agent (B) and carrier particles (C) having an average particle size of from 0.1 to 2.0 .mu.m and carrying a charge-controlling agent (B) on the surfaces thereof, the colorant being embedded in the original thermoplastic core particles by mixing the colorant and the original core particles while applying mechanical strain force to the mixed materials under such conditions that the resulting colorant-embedded core particles have an average particle size of from 1 to 15 .mu.m, and the carrier particles (C) with the charge-controlling agent (B) carried thereon being embedded in the colorant-embedded resin core particles (A') by mixing the resin core particles (A') and the carrier particles (C) with the agent (B) carried thereon while applying mechanical strain force to the mixed materials under such conditions that the resulting toner particles have an average particle size of from 1 to 20 .mu.m.