FIELD: controlling elements for printed objects, in particular, securities and their analogs.
SUBSTANCE: control element contains first pattern, which is imprinted on first side of object and contains at least a first set of geometric shapes, and also second pattern, imprinted on second side of object. Second pattern is imprinted oppositely to first pattern with maintenance of register, while second pattern contains at least a second set of geometric shapes, matching first bitmap. At least one of series of geometric shapes contains portions positioned so, that in register of correct installation of two-sided printing register control element contains zones of varying density, browsed during show through and formed by given shifted portions.
EFFECT: increased level of protection of printed objects from forgery, with use of control element.
3 cl, 39 dwg
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