Lightning Powder 1-0192 Black Emerald Magnetic Fingerprint Powder, 1 Ounce

Viewed under an alternate light source or laser, Black Emerald™ will fluoresce as bright green.Features:

• Extremely sensitive to long wavelength ultraviolet light (approx. 365nm)
• Can be viewed and photographed without a viewing filter.
• Can also dual-purpose as black latent print powder producing rich, easy-to-photograph black prints on light surfaces