Sirchie UVA201 ClueSpray Fluorescent Invisible Detection Powder, Light Buff/Green, 6 Ounce

Clue Spray is an invisible fluorescent powder packaged in an easy-to-use aerosol. Spray directly onto surfaces leaving a very fine film that blends easily on almost any object. When touched this film transfers to skin, clothing or other objects. Under normal light it’s buff color is almost invisible on a black or light-colored surface, but appears as a bright fluorescent green when exposed to longwave (UV) light. Use Clue Spray on carpets, tile, wood and just about any walking surface with limited access for tagging and tracing. Best used indoors as rain and wind can displace Clue Spray.