Fluorescein is an extremely useful reagent for the enhancement of suspected bloodstains, particularly on multi-colored backgrounds. Fluorescein is converted by the catalytic action of hemoglobin into Fluorescein, a bright yellow fluorescent chemical. After application by spraying, Fluorescein-treated bloodstains are visualized with UV light and will remain fluorescent for 15-30 minutes and allow additional time for the stain or pattern to be photographically documented. This new solvent-based formulation of Fluorescein is stable and is far less hazardous than previously available aqueous formulations or Luminol. Fluorescein can be used in twilight-type conditions and, unlike Luminol, stains treated with Fluorescein can be tested for DNA.
Parts A, B, and C to make 250mL