Vacuum metal deposition: factors affecting normal and reverse development of latent fingerprints on polyethylene substrates

Jones, Naomi; Stoilovic, Milutin; Lennard, Chris; Roux, Claude

doi:10.1016/s0379-0738(00)00310-8

Cited by 59 publications

(42 citation statements)

References 8 publications

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“…Further studies on fabric compared VMD and superglue fuming, which proved VMD to be more effective at developing fingermarks [14]. Despite the recent resurgence in VMD work and the price of VMD chambers dropping substantially over the last decade, very little has emerged recently comparing the efficiency of VMD in developing latent fingermarks on polymer banknotes, and other polymer substrates in general [15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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

Davis

Kelly

King

et al. 2016

Forensic Science International

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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 was conducted in to 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.

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Section: Introductionmentioning

confidence: 99%

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

Davis

Kelly

King

et al. 2016

Forensic Science International

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show abstract

“…Furthermore, there is no requirement that the vapor be collimated for the VMD technique, but collimation is essential for the CTF technique. Finally, a negative version of the fingerprint is usually developed in the VMD technique [12], whereas a positive version of the fingerprint is always developed in the CTF technique.…”

Section: Thin-film Development Techniquesmentioning

confidence: 99%

Vacuum-metal-deposition and columnar-thin-film techniques implemented in the same apparatus

Swiontek

Lakhtakia

2015

Materials Letters

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“…Optimum amount of Au for Au/Zn VMD varied with different plastics [6][7][8]. A thickness monitor has usually been required to control the deposition of extremely small amount of Au for Au/Zn VMD [5][6][7][8]. On the other hand, amount of zinc required to develop fingerprints in VMD has been determined until the fingerprints were seen.…”

Section: Introductionmentioning

confidence: 99%

Development of latent fingerprint by ZnO deposition

Jou

Chen

et al. 2011

Forensic Science International

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Vacuum metal deposition: factors affecting normal and reverse development of latent fingerprints on polyethylene substrates

Cited by 59 publications

References 8 publications

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

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

Vacuum-metal-deposition and columnar-thin-film techniques implemented in the same apparatus

Development of latent fingerprint by ZnO deposition

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