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Proceedings Paper

Direct laser engraving of intaglio printing plates
Author(s): Harald Deinhammer; Franz Loos; Daniel Schwarzbach; Peter Fajmann
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Paper Abstract

Traditionally, Intaglio printing is one of the key security elements for banknotes and security documents, providing high-resolution fine-line elements and the characteristic tactility easily recognized by the public. The conventional process of creating Intaglio printing-plates involves multiple production steps from the hand-engraving of the artist and the computer-aided-design of security elements to the final, print-ready metal plate. We present the results of a feasibility study regarding the direct laser engraving of Intaglio printing-plates. Results of our studies on laser optics and choice of material to achieve optimal line quality are presented. In our studies we have found a novel plate material superior to galvanic nickel regarding plate lengthening and have achieved line widths in the 10μm range. The process found, allows reintroducing true three-dimensional elements with line-depth and -profiling control independent of line-width, while decreasing lead-times in the production of security documents. We give a comparison between direct laser engraving and traditional platemaking, comparing aspects such as resolution, plate performance and production time.

Paper Details

Date Published: 3 June 2004
PDF: 10 pages
Proc. SPIE 5310, Optical Security and Counterfeit Deterrence Techniques V, (3 June 2004); doi: 10.1117/12.526899
Show Author Affiliations
Harald Deinhammer, Oesterrreichische Banknoten- und Sicherheitsdruck GmbH (Austria)
Franz Loos, Oesterrreichische Banknoten- und Sicherheitsdruck GmbH (Austria)
Daniel Schwarzbach, Oesterrreichische Banknoten- und Sicherheitsdruck GmbH (Austria)
Peter Fajmann, Oesterrreichische Banknoten- und Sicherheitsdruck GmbH (Austria)


Published in SPIE Proceedings Vol. 5310:
Optical Security and Counterfeit Deterrence Techniques V
Rudolf L. van Renesse, Editor(s)

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