Evaluation of 5-Methylthioninhydrin for the Detection of Fingermarks on Porous Surfaces and Comparison

Wallace; Kunkel, CS; Lennard, CJ; Stoilovic, M; Roux, CP

Evaluation of 5-Methylthioninhydrin for the Detection of Fingermarks on Porous Surfaces and Comparison

Wallace Kunkel, CS Lennard, CJ Stoilovic, M Roux, CP

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Publisher:: Canadian Identification Society
Publication Type:: Journal Article
Citation:: Identification Canada, 2006, 29 (1), pp. 4 - 13
Issue Date:: 2006-01

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Field	Value	Language
dc.contributor.author	Wallace	en_US
dc.contributor.author	Kunkel, CS	en_US
dc.contributor.author	Lennard, CJ	en_US
dc.contributor.author	Stoilovic, M	en_US
dc.contributor.author	Roux, CP https://orcid.org/0000-0003-3610-420X	en_US
dc.date.issued	2006-01	en_US
dc.identifier.citation	Identification Canada, 2006, 29 (1), pp. 4 - 13	en_US
dc.identifier.issn	0826-8142	en_US
dc.identifier.uri	http://hdl.handle.net/10453/14643
dc.description.abstract	The chemical 5-methylthioninhydrin was developed in the early 1990s for treating fingermarks on porous surfaces. Although many researchers showed the promise of this chemical during the years between 1990 and 1997, current research indicates that this reagent is sill not commonly used in casework. The current study assessed the commercially produced 5-methylthioninhydrin and compared it to the more commonly used reagents for detecting fingermarks on porous surfaces. The study found that 5-methylthioninhydrin is superior to ninhydrin; however, 1,2-indanedione produced a much stronger luminescence when used to treat latent fingermarks. Comparable fluorescence was produced with 5-methlthioninhydrin after metal salt treatment to DFO; the high background detracts from the ridge detail, however. The study concludes that although the cost of 5-methylthioninhydrin is higher than for conventional reagents, its use may be justified in some circumstances. The second article begins with an illustrated step-by-step demonstration of the technique for blending two exposures of the same scene. It involves the use of layers within Adobe Photoshop CS and then placing one exposure overtop of another exposure. The best qualities of each exposure are then used in the final print. The article then examines a few applied forensic applications of the blending of two exposures, including a technique for rescuing underexposed images. This issues section on Society Business (Canadian Identification Society) addresses Society awards, the Presidents message," the 29th CIS Educational Conference, guidelines for authors, a listing of award winners and past presidents, and a listing of staff members	en_US
dc.publisher	Canadian Identification Society	en_US
dc.relation.ispartof	Identification Canada	en_US
dc.title	Evaluation of 5-Methylthioninhydrin for the Detection of Fingermarks on Porous Surfaces and Comparison	en_US
dc.type	Journal Article
utslib.citation.volume	1	en_US
utslib.citation.volume	29	en_US
utslib.for	0399 Other Chemical Sciences	en_US
utslib.for	0699 Other Biological Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney/Strength - CFS - Centre for Forensic Science
utslib.copyright.status	closed_access
pubs.consider-herdc	false	en_US
pubs.issue	1	en_US
pubs.volume	29	en_US

Abstract:

The chemical 5-methylthioninhydrin was developed in the early 1990s for treating fingermarks on porous surfaces. Although many researchers showed the promise of this chemical during the years between 1990 and 1997, current research indicates that this reagent is sill not commonly used in casework. The current study assessed the commercially produced 5-methylthioninhydrin and compared it to the more commonly used reagents for detecting fingermarks on porous surfaces. The study found that 5-methylthioninhydrin is superior to ninhydrin; however, 1,2-indanedione produced a much stronger luminescence when used to treat latent fingermarks. Comparable fluorescence was produced with 5-methlthioninhydrin after metal salt treatment to DFO; the high background detracts from the ridge detail, however. The study concludes that although the cost of 5-methylthioninhydrin is higher than for conventional reagents, its use may be justified in some circumstances. The second article begins with an illustrated step-by-step demonstration of the technique for blending two exposures of the same scene. It involves the use of layers within Adobe Photoshop CS and then placing one exposure overtop of another exposure. The best qualities of each exposure are then used in the final print. The article then examines a few applied forensic applications of the blending of two exposures, including a technique for rescuing underexposed images. This issues section on Society Business (Canadian Identification Society) addresses Society awards, the Presidents message," the 29th CIS Educational Conference, guidelines for authors, a listing of award winners and past presidents, and a listing of staff members

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http://hdl.handle.net/10453/14643