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Article: Silver nitrate.(Standard Processes)(Brief Article)
- Article from:
- Forensic Science Communications
- Article date:
- January 1, 2001
CopyrightCOPYRIGHT 2001 Federal Bureau of Investigation at www.fbi.gov. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Silver nitrate is used to develop latent prints on porous specimens. It reacts with the sodium chloride (salt) content in perspiration. Silver nitrate can be prepared with two different carriers--water or alcohol. An alcohol-based solution can be prepared for processing specimens (e.g., waxed paper, cardboard with a wax finish, or Styrofoam[TM]) that may repel a water-based mixture.
Stains on blueprints, photographs, or photostats caused by silver nitrate treatment cannot be removed without defacing the specimens. Latent prints developed by the silver nitrate method on certain types of glossy paper will often disappear within hours. These latent prints should be ...