The comparison of sweat pores from latent fingerprint on different surfaces

Abstract

This research aimed to 1) investigate the appearance of finger sweat pores on various surfaces, including porous, nonporous, and semi-porous surfaces, and 2) develop guidelines for utilizing sweat pores in latent fingerprint examination for identity verification. The study adopted an experimental approach, collecting latent fingerprint samples from a sample group comprising 10 individuals aged between 20 and 40. Testing was conducted to observe the appearance of finger sweat pores in latent fingerprints on different surface types by collecting latent fingerprints and examining the presence of sweat pores that emerged. Sweat pores in latent fingerprints on porous, nonporous, and semi-porous surfaces were collected using Ninhydrin, black powder, and magnetic fingerprint powder, respectively. After that, statistical analysis was conducted to analyze the average number of sweat pores and variations in their appearance across the samples. The results showed that the average number of sweat pores of the 10 samples on the porous surface was 31.23±26, on the nonporous surface was 30.97±25.81, and on the semi-porous surface was 31±25.91 The One-way ANOVA analysis revealed no significant difference in the average number of sweat pores among the surfaces. Therefore, the number of individual sweat pores, together with minutiae, can be used to verify a person's identity. This can be used as a guideline for detecting latent fingerprints on evidence objects with insufficient minutiae in confirming personal identification based on further criteria.