FIELD: protection of plastic cards against forgery. SUBSTANCE: according to one of the methods an additional image is formed on the surface of plastic cards with the aid of a matrix formed by transfer of the image from the original photoform, being a direct copy on the side of the emulsive layer, according to the other method, an additional image is formed on the surface of plastic cards with the aid of a matrix formed in the delivery unit in the form of a photoform with a mirror image of the original on the side of the emulsive layer. EFFECT: enhanced protection against forgery. 5 cl, 2 dwg
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| SECURITY ELEMENT HAVING PATTERNED REGION WITH VARIABLE OPTICAL PROPERTIES | 2009 |
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SU1052867A1 |
| 0 |
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SU139668A1 |
