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NCJRS Abstract

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NCJ Number: 136030 Find in a Library
Title: Visualization Method for Fingerprints on Skin by Impression on a Polyethlene Terephthalate (PET) Semirigid Sheet
Journal: Journal of Forensic Sciences  Volume:37  Issue:2  Dated:(March 1992)  Pages:604-611
Author(s): Y Guo; L Xing
Date Published: 1992
Page Count: 8
Type: Test/Measurement
Format: Article
Language: English
Country: United States of America
Annotation: Based on the phenomenon that static electricity attracts dust, a polyethylene terephthalate (PET) semirigid sheet coated with printing ink was used to visualize impressions of fingerprinting ink was used to visualize impressions of fingerprints on the skin of living and dead bodies.
Abstract: The method presented in this article uses a PET semirigid sheet which is rubbed to produce static electricity; this attracts the dust and oil in skin fingerprints onto the PET sheet, and then the fingerprint impression is visualized using sidelighting. The PET sheet used for visualization of fingerprints is smeared at one side with a coating of dark printing ink. This increases the friction factor, produces high shading ability and a uniform color, and provides a sharp contrast to the impressed fingerprints. For fingerprints that yield inadequate contrast, an argon-ion laser can be used to improve the contrast. Compared with visualization methods for perspiration fingerprints, this method recovers better images for a longer time after the fingerprint has been deposited on skin. The method has been tested on living and dead bodies, and the fingerprint impressions all show good visualization results. 1 table, 7 figures, and 5 references
Main Term(s): Latent fingerprints
Index Term(s): Fingerprint image quality
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