Patent ID: 6436599
Filing Date: 2002-08-20
Classification: G03G

Abstract:
A method for producing a toner comprising a colorant, comprising:a step of dissolving or dispersing at least a binder resin, a colorant, and a releasing agent, in an organic solvent to prepare an oil-phase component; and a step of dispersing the oil-phase component in an aqueous medium to granulate the oil-phase component, wherein the binder resin contains a linear resin and a non-linear resin, and the releasing agent has an endothermic starting temperature of 40Â° C. or more and a melting point of 120Â° C. or less which are measured using a differential scanning calorimeter, the content of the releasing agent existing at the surface of toner particles is 1 to 10% of the total content of the releasing agent in each toner particle by weight; and the shape factor MLS2 of a toner particle of the toner which is represented by the following formula (I) is from 100 to 120 : MLS2=(absolute&it;â€ƒ&it;maximum&it;â€ƒ&it;length&it;â€ƒ&it;of&it;â€ƒ&it;toner&it;â€ƒ&it;particle)2(projected&it;â€ƒ&it;area&it;â€ƒ&it;of&it;â€ƒ&it;toner&it;â€ƒ&it;particle)Ã—Ï€Ã—14Ã—100.(I)