| 摘要 |
PURPOSE:To disable a copy to be read by printing one surface of a transparent film by using transparent ink in light red, etc., which colors darkly by copying and obtaining a laminate which has a printed mixed continuous pattern consisting of a base color surface and curves and straight lines, and heat-sealing the laminate to the surface of a secret document, etc. CONSTITUTION:The continuous pattern 3 consisting of the base color surface of 150 lines and 50% dots, and complicated waving curves A and straight longitudinal and lateral lattice-shaped straight lines B is printed on one surface of the transparent film 1 by using the transparent ink which colors darkly, i.e. light color tone such as light red, sepia, and brownish green by copying to obtain the laminate, which is heat-sealed on a secret document such as a bond. When this document is copied by a copying machine, the base color surface 2 is in light black and the pattern is in deep black to disable the copied record on the document to read, and the document is also disable to be read because of the blackening of the laminate. Thus, the document is prevented from being copied and altered. |
