Thermal development of latent fingermarks on porous surfaces-Further observations and refinements

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Show simple item record Song, DF Sommerville, D Brown, AG Shimmon, RG Reedy, BJ Tahtouh, M 2012-02-02T05:37:37Z 2011-01-30
dc.identifier.citation Forensic Science International, 2011, 204 (1-3), pp. 97 - 110
dc.identifier.issn 0379-0738
dc.identifier.other C1 en_US
dc.description.abstract In a further study of the thermal development of fingermarks on paper and similar surfaces, it is demonstrated that direct contact heating of the substrate using coated or ceramic surfaces at temperatures in excess of 230 °C produces results superior to those obtained using hot air. Fingermarks can also be developed in this way on other cellulose-based substrates such as wood and cotton fabric, though ridge detail is difficult to obtain in the latter case. Fluorescence spectroscopy indicates that the phenomena observed during the thermal development of fingermarks can be reproduced simply by heating untreated white copy paper or filter paper, or these papers treated with solutions of sodium chloride or alanine. There is no evidence to suggest that the observed fluorescence of fingermarks heated on paper is due to a reaction of fingermark constituents on or with the paper. Instead, we maintain that the ridge contrast observed first as fluorescence, and later as brown charring, is simply an acceleration of the thermal degradation of the paper. Thermal degradation of cellulose, a major constituent of paper and wood, is known to give rise to a fluorescent product if sufficient oxygen is available [1-5]. However, the absence of atmospheric oxygen has only a slight effect on the thermal development of fingermarks, indicating that there is sufficient oxygen already present in paper to allow the formation of the fluorescent and charred products. In a depletion study comparing thermal development of fingermarks on paper with development using ninhydrin, the thermal technique was found to be as sensitive as ninhydrin for six out of seven donors. When thermal development was used in sequence with ninhydrin and DFO, it was found that only fingermarks that had been developed to the fluorescent stage (a few seconds of heating) could subsequently be developed with the other reagents. In the reverse sequence, no useful further development was noted for fingermarks that were treated thermally after having been developed with ninhydrin or DFO. Aged fingermarks, including marks from 1-year-old university examination papers were successfully developed using the thermal technique. © 2010 Elsevier Ireland Ltd.
dc.language eng
dc.relation.hasversion Accepted manuscript version en_US
dc.relation.isbasedon 10.1016/j.forsciint.2010.05.008
dc.title Thermal development of latent fingermarks on porous surfaces-Further observations and refinements
dc.type Journal Article
dc.parent Forensic Science International
dc.journal.volume 1-3
dc.journal.volume 204
dc.journal.number 1-3 en_US
dc.publocation Clare, Ireland en_US
dc.publocation USA
dc.identifier.startpage 97 en_US
dc.identifier.endpage 110 en_US SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.conference Unmanned Ground Vehicle Technology V
dc.for 039902 Forensic Chemistry
dc.personcode 040570
dc.personcode 000263
dc.personcode 980366
dc.percentage 100 en_US Forensic Chemistry en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US 2004-04-21
dc.location.activity en_US
dc.location.activity Orlando, USA
dc.location.activity Ireland
dc.description.keywords Charring
dc.description.keywords Fingermarks
dc.description.keywords Fingerprints
dc.description.keywords Fluorescence
dc.description.keywords Forensic science
dc.description.keywords Thermal development
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - Forensic Science
utslib.copyright.status Open Access 2015-04-15 12:23:47.074767+10
pubs.consider-herdc true
utslib.collection.history School of Chemistry and Forensic Science (ID: 339)
utslib.collection.history General (ID: 2)

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