| abstract |
PROBLEM TO BE SOLVED: To improve the reliability of an image by reducing the fixing temperature and improving the interface strength of the joint interface between the core and the shell, thereby preventing the peeling of the shell layer and preventing the generation of fine powder. Provide photographic toner. In a method for producing an electrophotographic toner in which a colored particle surface comprising at least a binder resin and a colorant is coated with an amorphous resin, the binder resin has a melting point of 50 to 100 ° C. and a weight average. A crystalline polyester resin having a molecular weight of 12,000 or more and 50000 or less, and a dispersion of binder resin particles and a dispersion of colorant particles are mixed, and an aggregating agent is added to aggregate the binder resin particles and the colorant particles. An aggregating step for forming particles, an attaching step for attaching amorphous resin particles to the surface of the agglomerated particles, a coalescing step for coalescing the agglomerated particles at a temperature equal to or higher than the melting point of the binder resin, and at least 10 ° C./min And a cooling step in which the temperature is lowered to a temperature equal to or lower than the crystallization temperature of the binder resin at the above speed. [Selection figure] None |