Search Small Particle Reagent KitSmall Particle Reagent (SPR) is a suspension of fine molybdenum disulfide particles in a surface active solution for light colored surfaces and a white suspension for dark colored surfaces. It adheres to the fatty constituents of latent fingerprints to form a gray or white depositdepending on the reagent, and is a quick and simple latent print development process (recommended by the U. K. Home Office, Scientific Research and Development Branch). Each
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