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NCJ Number: 228236 Find in a Library
Title: Evaluation of the Dimethylaminocinnemaldehyde Contact Transfer Process and Its Application to Fingerprint Development on Thermal Papers
Journal: Journal of Forensic Identification  Volume:59  Issue:5  Dated:September/October 2009  Pages:545-568
Author(s): Jodie L. Lee; Stephen M. Bleay; Vaughn G. Sears; Sinem Mehmet; Ruth Croxton
Date Published: October 2009
Page Count: 24
Type: Report (Study/Research)
Format: Article
Language: English
Country: United States of America
Annotation: Results are presented from an analysis of the dimethylaminocinnemaldehyde (DMAC) development processes and its application to fingerprint development on thermal papers.
Abstract: Results indicate that the DMAC contact transfer process primarily targeted amino acids in the fingerprint; however, these might be less persistent than the constituents targeted by ninhydrin and diazafluoren-9-one (DFO). Consequently, the effectiveness decreases more rapidly as the fingerprints age. Overall, pre-dipping thermal receipts in ethanol prior to processing with ninhydrin or DFO was the most effective process for thermal papers. The use of DMAC as a fingerprint development reagent was first proposed in the 1970s as a solution-dipping technique to target the urea constituent of fingerprints. However, the quality of developed fingerprints was poor. Recently, the use of DMAC fuming and the use of sheets impregnated with DMAC solution have been proposed as alternative fingerprint development processes for porous surfaces, particularly thermal papers. This study was conducted to establish the effectiveness of the DMAC contact transfer technique for the development of fingerprints on thermal papers. Figures, tables, and references
Main Term(s): Fingerprints
Index Term(s): Evidence identification; Forensic sciences; Latent fingerprints
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