| 摘要 |
PURPOSE:To increase the accuracy of a copy of a continuous gradation part and to copy a face, stripe patterns of clothes, etc., accurately by providing halftone dots onto the under surface of a transparent film and forming a rugged mat surface on the top surface. CONSTITUTION:Halftone dots 3 of small black dots 2 are printed on the under surface of the transparent plastic film 1 and the rugged mat surface 4 is formed on the top surface. The mat surface 4 is frosted because of its ruggedness. A photograph (b) is placed on contact glass (a) for copying. The photograph is copied with light from a light source (c) in the form of whether a small black dot 2 is present or not. Diffused reflection is caused by the rugged mat surface 4, and there are therefore intense and weak light parts on close view; and the light is projected on a photosensitive body and a latent image of the original is formed on the photosensitive body and copied. Consequently, not only dots, but the light of the diffused reflection is adjusted and continuous gradations of the copying are represented more delicately. |
