Small Particle Reagent (SPR) is a well-known and utilized technique to develop latent prints on difficult surfaces such as wet surfaces like cold drink cans and automobiles with dew, oily surfaces, or textured surfaces.
Vials: To use, mix the contents of an SPR vial, either white or black, into 6 ounces of water. Mix these vigorously in the mixing bottle and pour into a spray bottle. While keeping the mix well shaken, spray the surface with a gentle misting spray. The SPR will stick to the prints.
Gently mist the area with our SPR Rinse Solution or clean water from another spray bottle to wash away the excess SPR. The prints can now be easily photographed. Prints can usually be lifted in a conventional manner after letting the surface air-dry. The SPR vials contain a detergent/dispersant concentrate.
Ready-to-use: Premixed liquid SPR solutions are in 1 liter bottles with pump sprayer.
Mini SPR Kit: Small enough to fit in a briefcase or crime scene kit and includes everything needed for a small scene or infrequent use. The kit includes an 8 ounce spray bottle of premixed black SPR and an 8 ounce spray bottle of rinse solution packaged in a sturdy box.
Combo Kit: 16 ounce white SPR, 16 ounce black SPR and 16 ounce rinse solution.