| abstract |
PROBLEM TO BE SOLVED: To provide a method for efficiently, simply and easily producing an azo pigment, an electrophotographic photoreceptor containing an azo pigment, an electrophotographic method, an electrophotographic apparatus, and a process cartridge for an electrophotographic apparatus. (1) A method for producing an azo pigment, comprising dissolving an azo pigment in a supercritical fluid or a subcritical fluid, and then depositing crystals. (2) An electrophotographic photosensitive member containing the azo pigment obtained by the above-mentioned production method, an electrophotographic method using the electrophotographic photosensitive member, an electrophotographic apparatus, or a process cartridge for an electrophotographic apparatus. |