The thermal visualisation of latent fingermarks on metallic surfaces

Graham Wightman, D. O’Connor

Research output: Contribution to journalArticle

  • 9 Citations

Abstract

Recent published research has lead to improved techniques for recovering latent fingermarks from metallic surfaces. The present study corroborates and extends some of the work carried out by Bond [1], [2] and [3], but an alternative mechanism is proposed for the thermal visualisation of fingermarks based on differential oxidation and the production of interference colours that improve contrast. Fingermarks treated at low temperature could be reheated to enhance recovery, but an upper temperature limit occurs beyond which the mark degrades. The mechanism of enhancement is discussed.
Original languageEnglish
Pages (from-to)88-96
Number of pages9
JournalForensic Science International
Volume204
Issue number1-3
DOIs
StatePublished - Jan 2011

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Wightman, Graham; O’Connor, D. / The thermal visualisation of latent fingermarks on metallic surfaces.

In: Forensic Science International, Vol. 204, No. 1-3, 01.2011, p. 88-96.

Research output: Contribution to journalArticle

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The thermal visualisation of latent fingermarks on metallic surfaces. / Wightman, Graham; O’Connor, D.

In: Forensic Science International, Vol. 204, No. 1-3, 01.2011, p. 88-96.

Research output: Contribution to journalArticle

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AB - Recent published research has lead to improved techniques for recovering latent fingermarks from metallic surfaces. The present study corroborates and extends some of the work carried out by Bond [1], [2] and [3], but an alternative mechanism is proposed for the thermal visualisation of fingermarks based on differential oxidation and the production of interference colours that improve contrast. Fingermarks treated at low temperature could be reheated to enhance recovery, but an upper temperature limit occurs beyond which the mark degrades. The mechanism of enhancement is discussed.

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