COMPARISON OF STABILITY LATENT FINGERPRINT ON PLASTIC
The aims of this research are to study the latent fingerprint remaining the period on plastic by on using black powder dusting and superglue method to reveals determined the latent fingerprints and compared them qualities of them on three types of plastic surfaces including Polyethylene Terephthalate (PET), High Density Polyethylene (HDPE) and Polystyrene Polypropylene (PP) The plastics were selected from the supermarket and they were investigated to find latent fingerprints in five different periods; 1 hour, 3 hours, 6 hours, 1 day, 5 days and 7 days. The numbers of latent fingerprints appearing were recorded. The result shows that the superglue method was detected the latent fingerprints on all kinds of a plastic surface but not in all periods. After comparing the duration of the latent fingerprint by using independent T-test statistic, it was found that, at a significance level of 0.05, both latent fingerprints appeared identical.