title: Chemical enhancement of fingermark in blood on thermal paper.
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.
authors.affiliation: Graduate School of Forensic Sciences, Soonchunhyang University, Asan, 336-745, Korea. Electronic address: swhong524@naver.com.
authors.forename: Sungwook
authors.initials: S
authors.lastname: Hong
authors.affiliation: Graduate School of Forensic Sciences, Soonchunhyang University, Asan, 336-745, Korea.
authors.forename: Jin Yi
authors.initials: JY
authors.lastname: Seo
mesh_terms: D000328:Adult; D000580:Amido Black; D001769:Blood; D004396:Coloring Agents; D003878:Dermatoglyphics; D005260:Female; D005840:Gentian Violet; D006801:Humans; D010209:Paper
chemical_list: D004396:Coloring Agents; C475159:leucocrystal violet; D005840:Gentian Violet; D000580:Amido Black
keywords: Amido black; Diluted blood; Hungarian red; LCV; Thermal paper