Small Particle Reagent (SPR) is quick, inexpensive and effective on fresh fingerprints SPR is composed of finely ground particles suspended in a detergent solution These particles adhere to the fatty constituents of latent fingerprints to form a visible deposit Latent prints developed using this method may be lifted using standard lifting mediums SPR400UV consists of 3 - 500ml bottles of Fluorescent Small Particle Reagent