JPS6257989B

PURPOSE:To improve the fixation and distinctness of images by forming the electrophotographic developer through combination of two kinds of capsuled toner materials formed by mutually containing solvents having dissolution ability to the other capsule wall materials and using this. CONSTITUTION:Coloring agents, fixing resins and dispersing solvent A1 are contained in a capsule wall material B1 to make capsules I. Coloring agents, fixing resins and siapersing solvent A2 are contained in a capsule wall material B2 to make capsules II. At this time, the solvent A1 which does not dissolves the wall material B1 and dissolves B2 and the solvent A2 which does not dissolve the wall material B2 and dissolves B1 are used as the abovementioned materials. According to the abovementioned developer, when the capsules are broken at the time of developing treatment, the solvents A1, A2 dissolve mutually the wall materials of the other capsules and therefore straight remaining of the broken capsule walls does not occur and the images of good quality may be obtained.