Manuscript Cu VMD.pdf (1.15 MB)

Visualisation of latent fingermarks on polymer banknotes using copper vacuum metal deposition: a preliminary study

Download (1.15 MB)
journal contribution
posted on 07.07.2016 by Lloyd W.L. Davis, Paul Kelly, Roberto S.P. King, Stephen M. Bleay
The UK's recent move to polymer banknotes has seen some of the currently used fingermark enhancement techniques for currency potentially become redundant, due to the surface characteristics of the polymer substrates. Possessing a non-porous surface with some semi-porous properties, alternate processes are required for polymer banknotes. This preliminary investigation explored the recovery of fingermarks from polymer notes via vacuum metal deposition using elemental copper. The study successfully demonstrated that fresh latent fingermarks, from an individual donor, could be clearly developed and imaged in the near infrared. By varying the deposition thickness of the copper, the contrast between the fingermark minutiae and the substrate could be readily optimised. Where the deposition thickness was thin enough to be visually indistinguishable, forensic gelatin lifters could be used to lift the fingermarks. These lifts could then be treated with rubeanic acid to produce a visually distinguishable mark. The technique has shown enough promise that it could be effectively utilised on other semi- and non-porous substrates.

History

School

  • Science

Department

  • Chemistry

Published in

Forensic Science International

Citation

DAVIS, L. ... et al, 2016. Visualisation of latent fingermarks on polymer banknotes using copper vacuum metal deposition: a preliminary study. Forensic Science International, 266, pp. e86-e92.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

30/05/2016

Publication date

2016

Notes

This paper was accepted for publication in the journal Forensic Science International and the definitive published version is available at http://dx.doi.org/10.1016/j.forsciint.2016.05.037

ISSN

1872-6283

Language

en

Exports