Patent ID: 7494758

Claim:
A process for producing toner particles to be obtained by granulating in an aqueous medium a colorant composition containing at least a colorant, wherein; an apparatus which forms the toner particles by granulation has a granulation tank and a stirrer, and, where the internal volume of the granulation tank is represented by A (L) and the volume of an air layer portion in the interior of the granulation tank by B (L), the air layer portion proportion B/A satisfies the following expression (1): 0.05≧B/A (1), wherein the air layer portion of said liquid enclosure tank is pressurized, wherein gauge pressure C (kPa) at the time the air layer portion of said liquid enclosure tank is pressurized satisfies the following expression (3): 100(kPa)≦C≦800(kPa) (3), wherein said stirrer is constituted of a rotating stirring blade and a stirring chamber and wherein in the step of granulation, said stirring blade is rotated at a peripheral speed of 17 m/sec or more and 40 m/sec or less.