Acid Yellow 7, Premixed Solution

Numerous methods of staining are used to develop or enhance blood-contaminated latent prints. These methods depend on staining the protein components of blood to form a more visible impression, commonly a dark blue or black. Among these methods are Amido Black, LeucoCrystal Violet, Coomassie Blue, and Acid Fuchsin. Acid Yellow 7 stain is one of the newer and more effective fluorescent stains used to enhance bloody footwear and fingerprint impressions on non-porous surfaces. Staining reveals a yellowish-colored print which fluoresces under blue-green light (400-490 nm). When lifted with a white gelatin lifter, the impression will often reveal enhanced fluorescence.   Sold in 1 Liter bottles.