SPR Spray (500ml Pump Bottles) WHITE or BLACK Pre-mixed in non-aerosol bottles with pump sprayers, this SPR solution is ready for use out of the box. Available in black or white. Use Black SPR on light-colored surfaces and White SPR on dark-colored surfaces. •Has a fluorescent component that allows fingerprints to be detected using an ultraviolet or forensic light source. •Pre-mixed SPR Spray has a shelf-life of six months from purchase •Should be stored in a dark, cool place •Two colors of SPR are available, black or white