Process for producing security papers, intaglio printing press for implementing said process, and security paper produced according to said process

摘要

There is described process for producing security papers, in particular banknotes, comprising the step of printing the security papers by intaglio printing so as to cover approximately the whole surface of each security paper with embossed intaglio patterns or with a combination of embossed intaglio patterns and flat intaglio patterns, at least a part of the embossed intaglio patterns and/or flat intaglio patterns being printed with a transparent or semi-transparent intaglio ink. The transparent or semi-transparent intaglio ink is applied in engraved areas and/or unengraved areas of the intaglio printing plate so as to seal substantially the whole surface of the security papers with intaglio patterns.. Also described are intaglio printing presses for implementing the said process and the resulting security papers.