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Currently, crime scene investigators visualize latent fingerprints by dusting them with powder and lifting them with adhesive tape, staining them with dye or fuming them with vaporized superglue.
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By Pat A. Wertheim. This article originally appeared in Minutiae, the Lightning Powder Co. Newsletter, #43, July-August 1997. Even though magnetic powder has been available since the early 1960’s, many latent print examiners and crime scene technicians are still not using it to full advantage.
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Commonly known as “dusting,” the act of applying fingerprint powder to a surface with a natural hair or fiber brush allows the powder to be lightly spread over a surface to make the print visible.
Lycopodium powder is a yellow-tan dust-like powder, consisting of the dry spores of clubmoss plants, or various fern relatives. When it is mixed with air, the spores formed are highly flammable and are used to create flashes or flames as theatrical special effects.
For fingerprint extraction, there are two basic types of dusting powder that can be used: regular powder: regular powder differs from magnetic powders in the respect that magnetic powders contain iron and they adhere to a magnet.
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She let them put their fingerprints on paper plates, powder to dust over them, tape to lift and place on a card. Ekpene, a Southeast Guilford middle school student, said he enjoys the activities they …