Transfer of Latent Prints on Duct Tape.

This research studied the transfer of latent prints from the adhesive side to the nonadhesive side of duct tape and vice versa. Initial trials were done to observe how easily this transfer occurs on an inexpensive type of duct tape and on a more expensive duct tape. The study was then expanded to include time trials and tape separation methods. Time trials tested transfer at 1 week, 6 weeks, and 3 months. Separation methods of tape included a freezer separation method and un-du (an adhesive neutralizer). The samples were processed for latent prints using cyanoacrylate fuming and a dye stain on the nonadhesive side of the tape and a powder suspension method on the adhesive side. Results showed that transfer occurred in both directions in most trials. This research illustrates that the comparison of latent prints from either side of duct tape should be conducted as the prints were observed and as laterally reversed images. [ABSTRACT FROM AUTHOR]