| 摘要 |
An identification card is constructed of several film layers (22), provided with 8 monochrome or polychrome printed image (21, 23, 24). The printed image may consist of partially overlapping printed layers placed over each other and distributed over the surfaces of the film layers. Alternatively a layer may be monochromatically coated and printed to give an image. The card may exhibit shadow effects viewed in incident light which are reversed in transmitted light. A certain spatial effect and definite half-tone grading of the printed pattern can be achieved by the number and arrangement of the various layers. The printings may be on at least two different layer surfaces, i.e. on the two sides of one layer or on two different layers. In place of printings some layers can be coloured and perforated. <IMAGE> |
