Fingerprint detection

Details Fingerprint detection Fingerprint detection

1989-06-16

1992-01-07

Bell, Janyce

Coating processes

Body member printing

427145, 427343, A61B 5117

Patent

active

050790293

ABSTRACT:
A method for detection and visualization of latent fingerprints is provided and includes contacting a substrate containing a latent print thereon with a colloidal metal composition for time sufficient to allow reaction of said colloidal metal composition with said latent print, and preserving or recording the observable print. Further, the method for detection and visualization of latent fingerprints can include contacting the metal composition-latent print reaction product with a secondary metal-containing solution for time sufficient to allow precipitation of said secondary metal thereby enhancing the visibility of the latent print, and preserving or recording the observable print.

REFERENCES:
patent: 2986831 (1961-06-01), Terek et al.
patent: 3075852 (1963-01-01), Bonora
patent: 4260645 (1981-04-01), Kerr et al.
patent: 4313734 (1982-02-01), Leuvering
patent: 4719119 (1988-01-01), Thompson et al.
patent: 4752567 (1988-06-01), De Brabander

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