Counterfeit banknote detection pen: Difference between revisions

Revision as of 08:33, 20 October 2022

Revision as of 08:34, 20 October 2022

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[[Counterfeit money|Counterfeit banknote]] detection pens are used to detect [[counterfeit]] [[Swiss franc]], [[euro]] and [[Federal Reserve note|United States banknotes]], amongst others. Typically, genuine banknotes are printed on paper based on cotton fibers and do not contain the starches that are reactive with iodine. When the pen is used to mark genuine bills, the mark is yellowish or colourless.

Such pens are most effective against counterfeit notes printed on a standard printer or [[photocopier]] paper.<ref>{{cite web|url= http://money.howstuffworks.com/question212.htm |title=How does a counterfeit detector pen work? 123 | work=HowStuffWorks |date=April 2000 |accessdate= 2008-03-28}}</ref> The chemical properties of US banknotes printed before 1960 make marking pens useless, resulting in [[false positives]].<ref>{{cite web

|url= http://www.coinbooks.org/esylum_v10n50a25.html

|title= OLD PAPER MONEY AND COUNTERFEIT-DETECTING PENS