Amber mark passes the test, while a dark brown or black mark means the bill is suspect.
Works on all new design U.S. currency (1959 and later).
Highly effective and inexpensive tool for detecting bad bills. Simply make a small mark on U.S. currency. Chemically sensitive ink works instantly. An amber mark passes the test, while a dark brown or black mark fails, meaning the bill is likely counterfeit. Works on all new design U.S. currency (bills series 1959 and later).
Counterfeit Bill Detectors-Multi-Test Counterfeit Bill Detector Systems
Counterfeit Bill Detector Type
Counterfeit Indication Mark
Black Dark Brown
U.S. and most foreign currencies
Includes ultraviolet light cap and 3 LR44 cell batteries
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Dual-Test UV Cap Pen-Powerful LED with ultraviolet light cap is highly effective on U.S. and foreign currencies passports credit cards cashier's checks and money orders. 3 LR44 cell batteries included.