| 摘要 |
PURPOSE:To maintain high picture image quality for a long time by incorporating a specified polycarbonate into a surface layer. CONSTITUTION:A supporting body of a magnetic brush is faced oppositely to a photosensitive body contg. polycarbonate constituted of a structural unit expressed by the formula I and/or a structural unit expressed by the formula II, as primary recurrent units in a surface layer, so as to permit relatively free displacement of the magnetic brush to the photosensitive body. And, the photosensitive body is developed while allowing the photosensitive body to contact by pressing to the magnetic brush. In the formulas, each R3 and R4 is H atom, alkyl group, cycloalkyl group, or aryl group, wherein either one of R3 or R4 is a bulky group; each R5-R12 is H atom, halogen atom alkyl group, or cycloalkyl group and the degree of polymn is 10-5,000; Z is an atomic group necessary for forming a carbocyclic ring or a heterocyclic ring and the degree of polymn. is 10-5,000. Thus, the photosensitive body is developed with a slight extent of abrasion even if the development is executed under a large grinding force, and picture images of high quality are obtd. for a long time. |
