COMPARISON OF STABILITY LATENT FINGERPRINT ON PAPER WITH BLOOD STAINS.

Nich  Wongsongja; Suppasit  Poonpinyo; Benjasine  Laowongsee

Nich Wongsongja Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok, Thailand
Suppasit Poonpinyo Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok, Thailand
Benjasine Laowongsee Faculty of Science and Technology, Suan Sunandha Rajabhat University, Bangkok, Thailand

Keywords: latent fingerprints, paper, blood stains

Abstract

The aims of this research are to study the latent fingerprint remaining the period on paper with blood stains by on using iodine and ninhydrin methods to reveals determined the latent fingerprints and compared them qualities of them on 10 types of paper; copy paper, green read paper, newspaper, corrugated box, lottery ticket, magazine paper, cash bill, envelope, thermal slip and brown envelope with blood stains. The paper were selected from everyday life and they were investigated to find latent fingerprints in 2 different methods; iodine and ninhydrin methods. The numbers of latent fingerprints appearing were recorded. The result shows that the iodine method was detected the latent fingerprints on paper with blood stains but not in all papers. After comparing the method of the latent fingerprint by using independent T-test statistic, it was found that, a significance at the level of 0.05, both latent fingerprints appeared identical.