skip navigation

PUBLICATIONS

Register for Latest Research

Stay Informed
Register with NCJRS to receive NCJRS's biweekly e-newsletter JUSTINFO and additional periodic emails from NCJRS and the NCJRS federal sponsors that highlight the latest research published or sponsored by the Office of Justice Programs.

NCJRS Abstract

The document referenced below is part of the NCJRS Virtual Library collection. To conduct further searches of the collection, visit the Virtual Library. See the Obtain Documents page for direction on how to access resources online, via mail, through interlibrary loans, or in a local library.

 

NCJ Number: 236578 Find in a Library
Title: Comparison of Different Physical Developer Working Solutions - Part I: Longevity Studies
Journal: Journal of Forensic Identification  Volume:61  Issue:6  Dated:November/December 2011  Pages:621-639
Author(s): Stephanie Houlgrave; Matt Andress; Robert Ramotowski
Date Published: December 2011
Page Count: 19
Publisher: http://www.theiai.org 
Type: Report (Study/Research)
Format: Article
Language: English
Country: United States of America
Annotation: This article discusses physical developer (PD) a widely used chemical processing technique for the development of latent prints on dry or wetted porous surfaces.
Abstract: Physical developer (PD) is a widely used chemical processing technique for the development of latent prints on dry or wetted porous surfaces. The objective of Part I of this research was to verify that the United States Secret Service (USSS) formulation for PD will outlast the 7-10-day shelf life that is mentioned by some practitioners. The USSS recently changed the nonionic surfactant from Synperonic N to Tween 20, which appear to have improved the longevity of the working solutions. This research compared fresh and aged batches of working solutions using both nonionic surfactants and determined that PD working solutions incorporating Synperonic N had a shelf-life ranging from 10 to 15 days, whereas PD working solutions incorporating Tween 20 had a shelf life of approximately two and one half months. In addition, Part II of this research will discuss the importance of reliability testing to determine the stability of the reagent and comparisons conducted between two different reliability test solutions, gold chloride (AuCl3) and EDTA tetra sodium salt. (Published Abstract)
Main Term(s): Criminology
Index Term(s): Comparative analysis; Fingerprints; Forensic sciences; Investigative techniques; Latent fingerprints; Suspect identification; US Secret Service
To cite this abstract, use the following link:
http://www.ncjrs.gov/App/publications/abstract.aspx?ID=258586

*A link to the full-text document is provided whenever possible. For documents not available online, a link to the publisher's website is provided. Tell us how you use the NCJRS Library and Abstracts Database - send us your feedback.