Effect of silver (Ag) deposition before physical developer to develop latent fingerprints on wet paper

Lee Wonyoung; 이원영; Kang Min-Jeong; 강민정; Lee Yoo-Jung; 이유정; Yu Je-seol; 유제설

doi:10.5806/ast.2023.36.6.324

오늘 하루 그만보기

P-ISSN1225-0163
E-ISSN2288-8985
SCOPUS, ESCI, KCI

Home

Browse Articles

Article Detail

Home > Article Detail

P-ISSN 1225-0163
E-ISSN 2288-8985

e-Submission

Vol.36, No.6

PDF Citation

Effect of silver (Ag) deposition before physical developer to develop latent fingerprints on wet paper

Analytical Science and Technology / Analytical Science and Technology, (P)1225-0163; (E)2288-8985

2023, v.36 no.6, pp.324-331

https://doi.org/10.5806/ast.2023.36.6.324

Wonyoung Lee (Graduate School of Forensic Science, Soonchunhyang University)
Min-Jeong Kang (Graduate School of Forensic Science, Soonchunhyang University)
Yoo-Jung Lee (Graduate School of Forensic Science, Soonchunhyang University)
Je-seol Yu (Graduate School of Forensic Science, Soonchunhyang University)

Lee, W., Kang, M., Lee, Y., & Yu, J. (2023). Effect of silver (Ag) deposition before physical developer to develop latent fingerprints on wet paper. , 36(6), 324-331, https://doi.org/10.5806/ast.2023.36.6.324

copy

Abstract

Latent fingerprints on wet paper cannot be developed using amino acid reaction reagents. Therefore, physical developer (PD) or lipid staining reagents like oil red O (ORO) should be utilized. However, ORO is not very effective in developing fingerprints that are older than approximately 4 weeks. On the other hand, PD performs well in developing older fingerprints, but it cannot do so for relatively fresh fingerprints. Additionally, PD has the disadvantage of taking a long time to develop fingerprints. In this study, in order to overcome the limitations of PD, we attempted to increase its reactivity by applying Ag-PD, which involves depositing silver onto paper using vacuum metal deposition (VMD), and compared this with fingerprints developed using ORO and PD. As a result, Ag-PD showed superior fingerprint development compared to ORO and PD on wet paper stored for 2~8 weeks, and the fingerprint development time for PD was significantly reduced to 90~150 seconds.