Fingerprints on banana revealed by magnetic powder

Fingerprints on banana revealed by magnetic powder

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This image is part of the feature Fingerprint Powder

Credit: JAMES KING-HOLMES/SCIENCE PHOTO LIBRARY

Caption: Fingerprints on banana. Close-up of fingerprints revealed on a banana by magnetic fingerprint powder - a new invention used to detect prints on surfaces impossible to check by conventional means. The powder consists of tiny iron flakes with an organic coating that makes them stick to the greasy residue in a fingerprint. Excess powder is removed by a magnet, removing the need for brushing and hence leaving intact the delicate ridge lines that make each print unique. The technique gives sharper results and works on difficult surfaces like plastic bags, magazine covers, wallpaper and wood.

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Keywords: banana, finger print, fingerprint, fingerprint powd, fingerprints, forensic, forensic science, forensics, iron filings, magnetic fingerprint powder, magnetic powder, research, science, technology

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