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U.S. Department of Energy
Office of Scientific and Technical Information

Fingerprint detection

Patent ·
OSTI ID:7297057

This patent describes a method for detection and visualization of latent fingerprints. It comprises contacting a substrate containing a latent print thereon the a colloidal metal composition at a pH from about 2.5 to about 4.0 for time sufficient to allow reaction of the colloidal metal composition with the latent print; and, preserving or recording the observable print.

Assignee:
NOV; EDB-92-138860; NOV-92-034471
Patent Number(s):
A; US 5079029
Application Number:
PPN: US 7-366951
OSTI ID:
7297057
Country of Publication:
United States
Language:
English