Enhancing the Quality of Aged Latent Fingerprints Developed by Superglue Fuming: Loss and Replenishment of Initiator

摘要: The recovery and identification of latent fingerprints from a crime scene are crucial to many investigations. cyanoacrylate (superglue) fuming method (CFM), which develops by growing polymer coating over the print residue, is powerful but encounters severe limitations when prints aged or exposed harsh environmental conditions. We examine aging process how changes that occur fingerprint residue time influence growth during development. identify loss initiator erosion degradation that, coupled with water result in decreased ability polymerize ethylcyanoacrylate. Then, we present methodology ethylcyanoacrylate recovered. Two enhancement agents, acetic acid ammonia, demonstrated improve ridges an order magnitude, while retaining integrity structure. Comparison between two agents indicate occurs due ridge ammonia pH control print.