Powerful yet compact ultraviolet penlight reveals UV-sensitive security markings on 1996 series or newer U.S. currency denominations greater than $1. Counterfeit detector pen uses a chemically sensitive ink to detect bad bills by marking a line on the...
Powerful yet compact ultraviolet penlight reveals UV-sensitive security markings on 1996 series or newer U.S. currency denominations greater than $1. Counterfeit detector pen uses a chemically sensitive ink to detect bad bills by marking a line on the...