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Technical Notes

Useful working tool to develop fingerprints on adhesive tapes with powder suspensions

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Pages 101-105 | Received 07 Nov 2017, Accepted 04 Jun 2019, Published online: 21 Jun 2019
 

Abstract

The majority of forensic laboratories use powder suspensions such as “wet powders” to develop fingerprints on adhesive tapes. These solutions are made of water, detergent, and particles that colour the mixture black or white. They are applied with a brush onto the surface to be treated. The operation may be complicated according to the length of the adhesive and the ability to wash off the tape using running water. In order to simplify the use of this method involving powder suspensions, the Fingerprints Unit of the Forensic Science Laboratory of the French Gendarmerie has developed a new working tool to facilitate treatment, rinsing and waste management.

RÉSUMÉ

Dans le cadre du traitement des adhésifs, la majorité des laboratoires utilise des poudres en suspension de type « wet powders ». Constituées d'eau, d'un détergent et de particules permettant d'obtenir une coloration blanche ou noire, ces solutions sont appliquées sur la surface à traiter avec un pinceau. La longueur des adhésifs à traiter ainsi que la difficulté à rincer le support rendent cette méthode peu facile. Afin de simplifier son emploi, le département Empreintes Digitales de L'IRCGN a développé un module de travail permettant de faciliter le traitement avec des poudres en suspension, le rinçage et la gestion des déchets.

Acknowledgements

The authors would like to acknowledge M. Ngo for his help with the fabrication of our adhesive treatment module.

Disclosure statement

No potential conflict of interest was reported by the authors.

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