SECURITIES WIT COLOR CODE, LAMINATED SECURITIES, SECURITY DOCUMENTS AND METHOD OF PRODUCTION OF SECURITIES Russian patent published in 1998 - IPC

FIELD: security document, in particular securities, production of documents and papers showing signs of security that can be easily distinguished by public, but cannot be copied by forgers, sign of security is also produced in the form of a color sign, securities of an even thickness are obtained. SUBSTANCE: securities has a pitchy sheet backing on which identification symbols are printed. The sheets of paper are laminated on each side or on any side of the pitchy sheet backing with the use of proper adhesive. In laminated securities the designation printed on the sheet backing are indistinguishable at examination in reflected light; however, they become visible at examination in transmitted light within the boundaries of visible spectrum. Securities may be included in security document in which the set of designations printed at least on one of the external surfaces of sheets of paper, for example, designations on the backing and designations on the document, make a composite picture at examination in transmitted light. The method of production of securities is also offered. The graphical picture is printed on pitchy sheet backing in the form of a transparent picture. The printed laminated sheet backing is formed between two sheets of paper by means of proper adhesive. EFFECT: enhanced security. 33 cl, 4 dwg, 1 tbl