A polymerized toner of core-shell structure, comprising core particles composed of colored polymer particles which contain a compound having at least one >C.dbd.N.sup.+ < structure in its molecule and a colorant, and a layer of a polymer having a glass transition temperature higher than that of a polymer component making up the core particles, said polymer layer covering each of the core particles, a production process thereof, an image forming process comprising using the polymerized toner, and an image forming apparatus containing the polymerized toner.

Полимеризованный тонер структуры сердечник-rakoviny, состоя из частиц сердечника составленных покрашенных частиц полимера которые содержат смесь имея по крайней мере одно C.dbd.N.sup.+