Positive film sheet for use as copying and forgery countermeasure
作者： Hiroshi Miura
DOI:
关键词: Copying 、 Latent image 、 Computer graphics (images) 、 Engineering 、 Polygon mesh 、 Countermeasure
摘要: A film positive sheet is adapted for a copying-forgery countermeasure and includes latent images (2) formed of multi-lines about 50-line 10% meshes 150-line 10%, background (3) or 10%. The further ground patterns (4) 175-line are disposed throughout the (3). Accordingly, print can be produced in single printing operation from sheet.
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