SIRCHIE®'s Fluorescen Magnetic Latent Print Powders feature bright pigments, superior ferrous compounds and an antismudge additive to ensure superior results when dusting for latent prints. These powders are especially useful when used on multicolored backgrounds. They can be applied with virtually all magnetic powder applicators. View dusting area with an ultraviolet blue or green forensic light source (254nm to 365nm) to see results. LL6032 is 16 oz. Green Fluorescent Magnetic Powder.