Counterfeit Detector by Sharpie is specially formulated to detect bad bills. The technology reacts to the presence of a key ingredient present in papers that are not used by the U.S. Treasury. The ink marked on a suspect, counterfeit bill will change in color from golden brown to blue-black. An authentic bill will not produce an ink color change. This marker is effective on all U.S. currency.
Apple, Brother, Dell, HP, IBM, Lexmark, Canon, Epson, Xerox and other manufacturer brand names and logos are registered trademarks of their respective owners. Any and all brand name designations or references are made solely for purposes of demonstrating compatibility.