Provided is a method of producing an electrophotographic photosensitive member having improved sensitivity and capable of outputting an image having less image defects due to a ghost phenomenon not only under a normal-temperature, normal-humidity environment but also under a low-temperature, low-humidity environment as a particularly severe condition. The method of producing a gallium phthalocyanine crystal includes subjecting a gallium phthalocyanine and a specific amine compound, which are added to a solvent, to a milling treatment to perform crystal transformation of the gallium phthalocyanine. In addition, the gallium phthalocyanine crystal is used in the photosensitive layer of the electrophotographic photosensitive member.
提供了一种制备电子照相成像材料的方法,该方法具有改善灵敏度和能够在正常温度、正常湿度环境和低温、低湿度环境下输出具有较少图像缺陷的图像的能力,特别是在低温、低湿度环境下,该方法包括将
镓酞菁和特定胺化合物添加到溶剂中,并对其进行磨研处理以进行
镓酞菁的晶体转化。此外,将
镓酞菁晶体用于电子照相成像材料的感光层中。