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Having the same wide rage of
sensitivity as Redwop™ fluorescent powder, Black Ruby™ is an excellent
primary-use magnetic powder for examination of latent prints using portable
lasers, Forensic Light Sources and ultraviolet light sources. Because of
it's nature Black Ruby™ Magnetic Powder is excellent as either a standard
black dusting powder or a fluorescent latent print powder. It can be lifted
just like any standard latent print powder, but when the surface is too
rough to lift the print, simply use your Forensic Light Source or laser to
flouresce the powder, and photograph it. Black Ruby™ magnetic powder is very
sensitive to 570-590 nm wavelength light when viewed through a red filter.
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