FIELD: polygraphy.
SUBSTANCE: method includes applying a protective element in form of micro-perforation to each unit of polygraphic product. Protection element is made in form of thematic image, which is producing using a stamp with linear knives 75 micrometers thick to produce perforation in form of lines using linear micro-notching of sheet carrier within limits of contour of thematic image for visualization of this image made in form of mark micro-perforation when the sheet is illuminated.
EFFECT: increased degree of protection of sheet carrier from forgery.
1 dwg
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