Latent Fingerprint Enhancement on a Brass Metal Surface using Paint Electrodeposition
Major
Chemistry
Department
Chemistry
Degree
Graduate
Mentor
David D. Cunningham
Mentor Department
Chemistry
Recommended Citation
Haskell, Reika D., "Latent Fingerprint Enhancement on a Brass Metal Surface using Paint Electrodeposition" (2017). University Presentation Showcase Event. 3.
https://encompass.eku.edu/swps/2017/graduate/3
Abstract
Fingerprint evidence recovered at a crime scene plays a key role in apprehending a suspect. Cyanoacrylate fuming is on the most successful methods of enhancing fingerprints from metallic surfaces. Despite the success of cyanoacrylate fuming, fingerprint recovery on fired cartridge casings is rarely successful. Therefore, a new fingerprint development method is needed to enhance fingerprint evidence that may still be present on fired cartridge casings. The aim of this research project is to study the use of metal and paint electrodeposition to enhance fingerprints on a brass metal surface.
High throw power paint was used in the initial studies; high throw power paint is formulated to coat the surface of the metal disks as well as any pits or crevices on the surface. These initial studies showed that commercial high throw paint had a tendency to cover not only the bare metal surface, but the fingerprint residue. In the next round of studies, adjustments to the formulation were made to decrease the binder concentration by addition of carbon black and polyethylene glycol. The pH of the high throw power paint was adjusted with the addition of acetic acid and ammonium hydroxide. Dilution of paint showed a modest increase in fingerprint enhancement. Changes in paint morphology upon adjustment of the binder and non-aqueous components were observed.
Presentation format
Poster
Poster Number
003
Latent Fingerprint Enhancement on a Brass Metal Surface using Paint Electrodeposition
Fingerprint evidence recovered at a crime scene plays a key role in apprehending a suspect. Cyanoacrylate fuming is on the most successful methods of enhancing fingerprints from metallic surfaces. Despite the success of cyanoacrylate fuming, fingerprint recovery on fired cartridge casings is rarely successful. Therefore, a new fingerprint development method is needed to enhance fingerprint evidence that may still be present on fired cartridge casings. The aim of this research project is to study the use of metal and paint electrodeposition to enhance fingerprints on a brass metal surface.
High throw power paint was used in the initial studies; high throw power paint is formulated to coat the surface of the metal disks as well as any pits or crevices on the surface. These initial studies showed that commercial high throw paint had a tendency to cover not only the bare metal surface, but the fingerprint residue. In the next round of studies, adjustments to the formulation were made to decrease the binder concentration by addition of carbon black and polyethylene glycol. The pH of the high throw power paint was adjusted with the addition of acetic acid and ammonium hydroxide. Dilution of paint showed a modest increase in fingerprint enhancement. Changes in paint morphology upon adjustment of the binder and non-aqueous components were observed.
