Suggested for use on dark surfaces where white contrast is desired. Latent prints dusted with white powder must be placed on black backing cards for the highest contrast when photographing. Source: www.forensicssource.com … [Read more...] about White Magnetic Fingerprint Powder
fingerprints
Alternate Light Source (ALS)
Alternate Light Source (ALS): It is becoming more commonplace for investigators to examine any likely surfaces (doors, doorknobs, windows, railings, etc.) with an alternate light source. These are laser or LED devices that emit a particular wavelength, or spectrum, of light. Some devices have different filters to provide a variety of spectra that can be photographed or … [Read more...] about Alternate Light Source (ALS)
Latent Fingerprints on the Neck of a Glass Bottle
Cyanoacrylate: Investigators often perform cyanoacrylate (superglue) processing, or fuming, of a surface before applying powders or dye stains. This process, typically performed on non-porous surfaces, involves exposing the object to cyanoacrylate vapors. The vapors (fumes) will adhere to any prints present on the object allowing them to be viewed with oblique ambient … [Read more...] about Latent Fingerprints on the Neck of a Glass Bottle
