Fingerprint detection

Patent · Tue Dec 31 23:00:00 EST 1991

OSTI ID:868115

Saunders, George C ^[1]

---

1. Rt. 1, Box 428B, Espanola, NM 87532

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.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM
• DOE Contract Number: W-7405-ENG-36
• Assignee: Saunders, George C. (Rt. 1, Box 428B, Espanola, NM 87532)
• Patent Number(s): US 5079029
• OSTI ID: 868115
• Country of Publication: United States
• Language: English

Related Subjects

/427/
allow
colloidal
colloidal metal
composition
composition-latent
contacting
containing
containing solution
detection
enhancing
fingerprint
fingerprints
latent
metal
metal composition
metal-containing
method
observable
precipitation
preserving
print
product
provided
reaction
reaction product
recording
secondary
secondary metal
solution
substrate
substrate contain
substrate containing
sufficient
thereon
time
time sufficient
visibility
visualization