A pseudo-operational trial: An investigation into the use of longwave reflected UV imaging of cyanoacrylate developed fingermarks.

This work presents a pseudo-operational study on plastic bags for the detection of latent fingermarks with various types of cyanoacrylates, including the two-step process with basic yellow 40 (BY40) staining and one-step fluorescent cyanoacrylates, Lumicyano and Polycyano. The use of longwave reflected UV (LWRUV) was employed as part of sequential development for all processes; however, detected marks were not unique as subsequent BY40 staining detected these marks as well. The use of BY40 in the sequence is very important, as without its inclusion many fingermarks would be missed.