Patent ID: 7767375

Claim:
A process for producing a polymerized toner, comprising Step 1 of preparing a polymerizable monomer composition containing a polymerizable monomer and a colorant and Step 2 of polymerizing the polymerizable monomer composition with a polymerization initiator to form colored polymer particles, wherein, Step 1 comprises Step A of finely dispersing the colorant in a liquid mixture containing the polymerizable monomer and the colorant, and further wherein Step A comprises the following Steps A1 and A2: (1) Step A1 of feeding a liquid mixture containing a polymerizable monomer and a colorant, which has a volume average particle diameter of 20 μm or larger and/or contains particles having a particle diameter of 51 μm or larger in a volume percentage of 20% or higher, to a dispersing machine by which mechanical shearing force is applied by rotation of an agitating blade to preliminarily disperse the colorant in such a manner that the volume average particle diameter of the colorant becomes smaller than 20 μm, and the volume percentage of the particles having a particle diameter of 51 μm or larger becomes lower than 20%; and (2) Step A2 of feeding the liquid mixture containing the polymerizable monomer and the colorant and preliminarily dispersed in Step A1 to a media dispersing machine equipped with a media-separating screen to more finely disperse the colorant in the liquid mixture, thereby preparing a polymerizable monomer dispersion liquid.