A simple chemical method for visualization of sebaceous fingerprints on unfired cartridge cases by Prussian blue deposition

A simple chemical method for visualization of sebaceous fingerprints on unfired cartridge cases... This paper presents a new method for chemical development of latent fingerprints on unfired cartridge cases and some metal surfaces. It is based on chemical deposition of Prussian blue on uncontaminated metal surfaces. The deposited material is easily prepared by successive immersion of the unfired cartridge cases into an acidic aqueous solutions of Fe2(SO4)3 and K4[Fe(CN)6]. The Prussian blue deposits on the substrate in the valleys between the fingerprint ridges. The visualized fingerprints are with very good contrast. The proposed method is simple and exhibits excellent reproducibility, which makes it favorable for application in cases where the cartridge cases are unfired and without corrosion on its metal surface. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Applied Chemistry Springer Journals

A simple chemical method for visualization of sebaceous fingerprints on unfired cartridge cases by Prussian blue deposition

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Publisher
Pleiades Publishing
Copyright
Copyright © 2015 by Pleiades Publishing, Ltd.
Subject
Chemistry; Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering
ISSN
1070-4272
eISSN
1608-3296
D.O.I.
10.1134/S10704272150110233
Publisher site
See Article on Publisher Site

Abstract

This paper presents a new method for chemical development of latent fingerprints on unfired cartridge cases and some metal surfaces. It is based on chemical deposition of Prussian blue on uncontaminated metal surfaces. The deposited material is easily prepared by successive immersion of the unfired cartridge cases into an acidic aqueous solutions of Fe2(SO4)3 and K4[Fe(CN)6]. The Prussian blue deposits on the substrate in the valleys between the fingerprint ridges. The visualized fingerprints are with very good contrast. The proposed method is simple and exhibits excellent reproducibility, which makes it favorable for application in cases where the cartridge cases are unfired and without corrosion on its metal surface.

Journal

Russian Journal of Applied ChemistrySpringer Journals

Published: Feb 17, 2016

References

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