Black oxide powder for developing latent (non-visible) prints on nonporous surfaces such as painted wood, metal, and most plastics | Black color enhances contrast with light-colored surfaces | Adheres to oily or moist deposits, particularly sebaceous secretions that may contaminate the fingertips | Produces optimal results on newer prints found on dry, smooth, non-adhesive surfaces | Jar contains a 2oz. (59mL) volume of powder