METHOD OF CREATION OF CONCEALED IMAGE IN PROTECTIVE ELEMENTS OF PRINTED MATTER TO PREVENT COUNTERFEITS Russian patent published in 2007 - IPC B42D15/00 

FIELD: printing industry.

SUBSTANCE: according to proposed method of creating of concealed image in protective elements of printed matter to prevent counterfeits, color picture is made of sheet carrier consisting of printed raster with straight-line elements arranged in parallel at equal distance from each other and three-dimensional raster with straight-line elements arranged at equal distance from each other. Lines of printed raster are made in form of strips of different color, thickness 0.1 mm, alternating at pitch equal to product of strip thickness by number of strips in pitch. Straight-line elements of three-dimensional raster are made by microrelief stamping on stop cylinder machine from side of sheet carrier opposite to side with printed elements, with thickness of microrelief lines equal to 1.5 of thickness of printed element strip and pitch of microrilief lines equal to doubled thickness of microrelief lines and angle of tilting of said lines relative to printed lines equal to 2 degrees.

EFFECT: improved protection of carrier from counterfeits owing to rainbow effect when viewing the image at acute angle.

6 dwg