Production of a seamless intaglio printing cylinder comprises an laser or electron radiation and/or punch engraving step followed by an etching process

摘要

Production of a seamless intaglio printing cylinder comprises using laser or electron radiation and/or punch engraving the required letters, pattern, image or lines on the device followed by an etching process, giving good precision. Production of a seamless intaglio printing cylinder comprises using laser or electron radiation and/or punch engraving the required letters, pattern, image or lines on the device, in the form of a defined pattern, followed by an etching process. An Independent claim is included for the obtained printing device.