FIELD: polygraphy.
SUBSTANCE: invention relates to protection from forgery of printing products, including plastic and paper: banknotes, securities, documents, passport pages, identification cards, bank cards. Disclosed is a protective element for sheet printing product, comprising a multilayer transparent structure with rasterised images, creating an optically variable effect. According to invention, multilayer transparent structure comprises two different rasterised images, located in one layer, and in another layer there is linear raster, wherein said layers are located at a distance from each other, determined by resolution of rasterised images, wherein upon viewing protective element on transmission or reflection at different angles various images are alternately visible.
EFFECT: technical result is higher degree of protection of printing products and valuable documents.
9 cl, 2 dwg
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