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# Trace Explosives Standard

SRM 2905, Trace Particulate Explosive Simulants, consists of four different test substances designed to simulate trace residues of C-4 plastic explosives and TNT. Seen through a pair of specially filtered glasses under a blue crime-scene light, a spot of the fluorescently tagged SRM is plainly visible (lower middle) on the test paper.

 CSTL

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September 8, 2009

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