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A counterfeit banknote detection pen, used to detect fake banknotes. A counterfeit banknote detection pen is a pen used to apply an iodine-based ink to banknotes in an attempt to determine their authenticity. The ink reacts with starch in wood-based paper to create a black or blue mark but the paper in a real bill contains no starch, so the pen ...
A currency detector or currency validator is a device that determines whether notes or coins are genuine or counterfeit.These devices are used in a wide range of automated machines, such as retail kiosks, supermarket self checkout machines, arcade gaming machines, payphones, launderette washing machines, car park ticket machines, automatic fare collection machines, public transport ticket ...
In 1805, Messrs. Gilbert and Dean published a broadside describing contemporary counterfeit bills, which may have represented the first use of the term counterfeit detector. They followed this in 1806 with the 12-page pamphlet The Only Sure Guide to Bank Bills; or Banks in New-England; with a statement of Bills Counterfeited. It contained ...
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UV marker with UV led lamp. An ultraviolet (UV) marker is a pen whose marks are fluorescent but transparent; the marks can be seen only under an ultraviolet light. They are commonly used in security situations to identify belongings or to prevent the reproduction of unauthorized banknotes. UV pens can now be bought at some stationery shops to ...
Tracers and markers can also be added to the ink or bonding agent providing forensic evidence linking the criminal to the crime. Bonding agents (i.e. glues) have been used more recently. Stained bills cannot be brought back into circulation easily, because they are visually and/or forensically linked quickly to the crime scene.