| 摘要 |
PURPOSE:To provide high sensitivity and high endurance to a receptor and to enhance the heat resistance (Se crystallization) and the moisture resistance by adding an azo pigment having an azo group bonded to a specified coupler residue to the molecule. CONSTITUTION:To the molecule of the photosensitive layer of an electro-photographic receptor is added an azo pigment used to erase a letter pattern stored in a storage device 5 and having an azo group bonded to a coupler residue expressed by formulaIThe especially preferred azo pigment used in this invention is a bisazo or trisazo pigment expressed by formula III or IV. |
