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

journal contribution
posted on 2023-07-26, 14:36 authored by Joanne Morrissey, Jennifer Larrosa, Jason W. Birkett
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.

History

Refereed

  • Yes

Volume

67

Issue number

3

Page range

313-322

Publication title

Journal of Forensic Identification

ISSN

0895-173X

Publisher

International Association for Identification

Language

  • other

Legacy posted date

2019-04-10

Legacy Faculty/School/Department

ARCHIVED Faculty of Science & Technology (until September 2018)

Note

A copy is available at http://researchonline.ljmu.ac.uk/8218/

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