A preliminary evaluation of the use of gun bluing to enhance friction ridge detail on cartridge casings

Morrissey, Joanne and Larrosa, Jennifer and Birkett, Jason W. (2017) A preliminary evaluation of the use of gun bluing to enhance friction ridge detail on cartridge casings. Journal of Forensic Identification, 67 (3). pp. 313-322. ISSN 0895-173X

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Official URL: http://researchonline.ljmu.ac.uk/8218/

Abstract

Friction ridge detail was enhanced on fired and unfired 9mm brass luger ammunition casings using three techniques, two involving Gun Blue reagent at a concentration of 50% v/v. Fingermarks were deposited on a total number of 90 ammunition casings and half were discharged using a Glock 19 semiautomatic pistol. Mark development was achieved using either Superglue Fuming followed by Basic Yellow 40 Fluorescent Dye Staining (SG-BY40), Superglue Fuming followed by Gun Blue (SG-GB), or Gun Blue (GB) as a single process. All three processes developed ridge detail on both fired and unfired casings. The results of this preliminary work show that the use of Gun Blue as a single enhancement technique was able to enhance ridge detail of the highest quality and clarity particularly on fired casings, making it the most effective process.

Item Type: Journal Article
Additional Information: A copy is available at http://researchonline.ljmu.ac.uk/8218/
Keywords: Friction ridge, Gun Blue, casings, fingermarks
Faculty: Faculty of Science & Technology
SWORD Depositor: Symplectic User
Depositing User: Symplectic User
Date Deposited: 10 Apr 2019 10:19
Last Modified: 31 Jul 2019 15:16
URI: http://arro.anglia.ac.uk/id/eprint/704274

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