Used for the presumptive identification of bloodstains, Hemident™ is nondestructive and enables the investigator to retain the evidence intact for further laboratory analysis. Each test is a compact, self-contained unit, consisting of two ampoules of prescribed reagents within a disposable plastic tube. To use Hemident™, simply swab the suspected blood stain/drop with a cotton-tipped swab (swab bulb may be moistened with water if suspected blood is dry), then break off wooden swab shaft and place swab bulb in the tube. Break the two ampoules which contain the reagent. If the stain/drop is blood, the swab and solution will turn blue-green in a few seconds. The reagents are capable of identifying down to one part per million of blood. Hemident™ was designed for field test use and, as such, will not distinguish between human and animal blood. Laboratory analysis is necessary to determine the source of the blood.