FIELD: printing arts and concerns the printed matter with an image concealed from visual observation.
SUBSTANCE: the printed matter has a medium with the main image applied onto it transferred by a regulated raster with a preset angle and lineature, and at least with one additional image concealed from visual observation transferred by a raster with a deformed structure with a possibility of identification of the concealed image at imposition of a reference template onto the printed product. The concealed image is made for visualization in half-tones or in a contour at imposition of a reference template representing a transparent base with a linear raster applied onto it, whose angle and lineature are identical to the preset ones.
EFFECT: enhanced degree of protection of the printed matter at a use of a sufficiently simple reference template.
14 cl, 8 dwg
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