Chemical enhancement of fingermark in blood on thermal paper. (December 2015)

• Record Type: Journal Article
• Authors: Hong, Sungwook; Seo, Jin Yi
• Is Part Of: Forensic science international. Volume 257(2015)
• Page Start: 379
• Page End: 384
• Publication Date: 2015-12
• Subjects: SSA 5-sulfosalicylic acid -- LCV leuco crystal violet -- PVP polyvinylpyrrolidone -- DABCO 1, 4-Diazabicyclo[2.2.2]octane; Thermal paper -- LCV -- Amido black -- Hungarian red -- Diluted blood; Medical jurisprudence -- Periodicals; Chemistry, Forensic -- Periodicals; Forensic Medicine -- Periodicals; Médecine légale -- Périodiques; Chimie légale -- Périodiques; Gerechtelijke geneeskunde; Gerechtelijke chemie; Gerechtelijke psychiatrie; Chemistry, Forensic; Medical jurisprudence; Electronic journals; Periodicals; Electronic journals; 614.1
• DOI: 10.1016/j.forsciint.2015.10.011
• Languages: English
• ISSNs: 0379-0738

Abstract

Highlights: Heme-reactive blood staining reagents damage the fine detail of fingermarks. Hungarian red is unsuitable for blood stain enhancement, on thermal paper. Gelatin lifting following blood staining damages the surface of thermal paper. Amido black is a superior bloodstain enhancement reagent than LCV and Hungarian red. Abstract: Chemical enhancement methods for fingermark in blood deposited on the surface of a thermal paper substrate were examined. The blood-sensitive reagents compared were LCV (leuco crystal violet), Amido black and Hungarian red. Fingermark in blood on the surface of thermal paper can be fixed with 2% 5-sulfosalicylic acid solution. LCV was found as an inadequate blood staining reagent because of bubbling, diffusion, and blurring on the surface of thermal paper. Hungarian red was also an inadequate blood staining reagent because excess Hungarian red on the surface of thermal paper was not washed away in the de-staining procedure. Amido black was the best staining reagent among three staining reagents compared. The maximum dilution ratio visible to the naked eye after Amido black staining was 1 in 80 for the thermally sensitive surface and 1 in 20 for the thermally non-sensitive surface.