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Proceedings Paper

LEAN: laser-etched aqua number
Author(s): Karel J. Schell
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Paper Abstract

A security device on a banknote has to be recognized immediately by the general public and has to enable the general public to establish the genuineness of the banknote. This is the so-called first line of defense. Recently the development of the ability to establish the genuiness has gained momentum and is called 'self authenticating.' Comparing the banknote number with a 'watermark number' can do authenticating. The watermark number is engraved by a laser beam in the paper and is -- as the printed number -- different for each note. Recent progress in the material processing by laser enables the engraving of the individual watermark number for each banknote in line with the production process.

Paper Details

Date Published: 1 April 1998
PDF: 8 pages
Proc. SPIE 3314, Optical Security and Counterfeit Deterrence Techniques II, (1 April 1998); doi: 10.1117/12.304692
Show Author Affiliations
Karel J. Schell, Schell Consulting (Netherlands)

Published in SPIE Proceedings Vol. 3314:
Optical Security and Counterfeit Deterrence Techniques II
Rudolf L. van Renesse, Editor(s)

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