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Proceedings Paper

Fingerprints on counterfeit currency
Author(s): Tao Lin; E. Roland Menzel
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Paper Abstract

A number of techniques, including 5-methoxyninhydrin/ZnCl2, DFO, DMAC, physical developer, colloidal gold, membrane transfer and vapor development, have been explored in an attempt to distinguish between fingerprints on counterfeit currency before and after the inking. Color copying and offset printing counterfeiting were considered. The printing ink proves to be too permeable to permit ready distinction between 'before' and 'after' fingerprints. There are subtle differences between before and after fingerprint fluorescence spectra (5-methoxyninhydrin/ZnCl2). However, given that one has to contend with finger contamination, the spectroscopy is at present not practically useful, but it shows potential if the fingerprint fluorescence spectrum can be correlated quantitatively with the ink absorption spectrum. Time-resolved spectroscopy in concert with rare-earth-based fingerprint development strategies may be useful as well.

Paper Details

Date Published: 25 March 1996
PDF: 9 pages
Proc. SPIE 2705, Fluorescence Detection IV, (25 March 1996); doi: 10.1117/12.236188
Show Author Affiliations
Tao Lin, Texas Tech Univ. (United States)
E. Roland Menzel, Texas Tech Univ. (United States)

Published in SPIE Proceedings Vol. 2705:
Fluorescence Detection IV
E. Roland Menzel; Abraham Katzir, Editor(s)

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