FIELD: forgery protection of documents.
SUBSTANCE: to produce latticed image for forgery-protected document in drawing program in a field limited with contour line (9), stroke lines (11) are positioned, on basis of points of intersection of stroke lines (11) with contour line (9) coordinates of lattice pattern elements are computed, and data sets produced in such a way are inputted into system for controlling lithographic plant.
EFFECT: development of reliable and comfortable method for producing latticed images with high luminosity and optically variable properties.
10 cl, 14 dwg
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