| 摘要 |
PURPOSE:To enable to copy with a simple copying stage a large number of sheet which can be erased by an optical treatment by using an electrophotographic sensitive body having a photosensitive layer contg. a photochromic sensitive compd. having photoconductivity for light having different wavelength before and after photochromism. CONSTITUTION:A picture image is recorded due to transformation of a compd. A in a photosensitive layer 2 on an electroconductive base body 1 to a compd. B when the photosensitive layer 2 is image-exposed with isomerizing wavelength of light. Then, when the surface of the photosensitive body is charged to a fixed polarity and exposed uniformly to light having an absorption maximum wavelength of the compd. B, a carrier is generated in the region of the compd. B. Electric charge of a charge transfer layer 3 is eliminated, a latent image is formed, and a copy picture image is formed by development, etc. Further, the recorded picture image is erased by the irradiation of wavelength causing isomerization from the compd. A to the compd. B. By this process, many sheets of copy which are erasable by an optical treatment requiring no heat-treatment are obtd. with a simple copying process.
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