title: Vapor-phase staining of cyanoacrylate-fumed latent fingerprints using p-dimethylaminobenzaldehyde.
abstract: Contrasting or enhancing of cyanoacrylate ester-fumed latent fingerprints deposited on solvent-sensitive materials such as oil marker writings and rough surface materials such as unglazed earthenware is not easy by conventional dye solutions dipping or dye powder dusting. In this study, a new vapor-phase staining method using p-dimethylaminobenzaldehyde (DMAB) is proposed for staining such materials. DMAB has high volatility and selective absorbability to cyanoacrylate-fumed fingerprints, so that cyanoacrylate-treated samples can be easily stained by leaving them simply in a closed container along with DMAB crystals for 48-96 h at room temperature or in conjunction with the use of mild heating. The stained fingerprint could be excited by UV irradiation (365 nm), and the fluorescent fingerprint was photographed through a UV cut-off filter (420 nm). The new method achieved minimally destructive fluorescent staining for the solvent-sensitive samples and the rough surfaced samples.
authors: Forensic Science Laboratory, Hyogo Prefectural Police Headquarters, Chuo-ku, Kobe, Japan. masahisa_takatsu@ybb.ne.jp
authors: Masahisa
authors: M
authors: Takatsu
authors: Osamu
authors: O
authors: Shimoda
authors: Hiroyoshi
authors: H
authors: Teranishi
mesh_terms: D001547:Benzaldehydes / Q000737:chemistry*; D003487:Cyanoacrylates / Q000737:chemistry; D003878:Dermatoglyphics; D005453:Fluorescence; D006801:Humans; D008027:Light; D013194:Staining and Labeling / Q000379:methods; D013499:Surface Properties; D014466:Ultraviolet Rays; D014835:Volatilization
chemical_list: D001547:Benzaldehydes; D003487:Cyanoacrylates; C510241:p-dimethylaminobenzaldehyde