Development of Submerged Latent Fingerprints on NonPorous Substrates with Activated Charcoal based Small Partical Reagant
Keywords:Forensic Science, Fingerprint visualization, SPR, Small particle reagent, latent fingerprint development.
The practice of using small partial reagent (SPR) for the visual development of latent fingerprints is the
preferred choice, particularly concerning wet surfaces. In the present study, non-porous surfaces impinged
with latent prints submerged in the water simulating acidic basic and salty water bodies were developed
with activated charcoal based small particle reagent method. As evident from the observations, the activated
charcoal-based SPR method was able to develop latent fingerprint submerged on the glass surface for up
to 11 days and on aluminium substrate, up to 12 days but the quality of fingerprint observed was better on
the glass substrate. The shelf life of the activated charcoal-based SPR method was found to be 52 days. The
results have shown that the time-lapse of submersion and quality of fingerprint developed are inversely
prepositional to each other. Although pond water submerged substrates showed good quality developed
fingerprints for a longer period than other mediums but with increasing period of submersion the quality
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