Visualisation of latent fingermarks on polymer banknotes using copper vacuum metal deposition: A preliminary study
Journal article
Davis, L.W.L., Kelly, P.F, King, R.S.P and Bleay, S.M (2016). Visualisation of latent fingermarks on polymer banknotes using copper vacuum metal deposition: A preliminary study. Forensic Science International. 266, pp. e86-e92. https://doi.org/10.1016/j.forsciint.2016.05.037
| Authors | Davis, L.W.L., Kelly, P.F, King, R.S.P and Bleay, S.M |
|---|---|
| Abstract | © 2016 Elsevier Ireland Ltd 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. |
| Keywords | Humans; Copper; Thioamides; Polymers; Dermatoglyphics; Volatilization; Light; Paper |
| Year | 2016 |
| Journal | Forensic Science International |
| Journal citation | 266, pp. e86-e92 |
| ISSN | 0379-0738 |
| Digital Object Identifier (DOI) | https://doi.org/10.1016/j.forsciint.2016.05.037 |
| Publication dates | |
| 01 Sep 2016 | |
| Publication process dates | |
| Deposited | 09 Apr 2019 |
| Accepted | 30 May 2016 |
| Accepted author manuscript | License File Access Level Open |
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