Volume 37, Issue 1 (January 1992)
Contrast Enhancement of Cyanoacrylate-Developed Latent Fingerprints Using Biological Stains and Commercial Fabric Dyes
Cyanoacrylate-developed latent fingerprints may be difficult to see or photograph if they are on light-colored surfaces. Biological stains and Rit® fabric dyes were tested for their ability to stain cyanoacrylate-developed latent fingerprints. Methanolic solutions of gentian violet, safranin bluish stain, diamond fuchsin, methyl green, iodine green, and Janus green B were found to stain cyanoacrylate-developed fingerprints on polyethylene, porcelain, and aluminum beverage cans. Hot (60°C) aqueous solutions of seven different shades of Rit® fabric dyes were found to stain cyanoacrylate-developed latent fingerprints on polyethylene, porcelain, aluminum beverage cans, and Styrofoam cups. The latent fingerprints stained with safranin bluish stain were strongly fluorescent under 312 nm ultraviolet light; latent fingerprints stained with gentian violet and diamond fuchsin were weakly fluorescent.