Content deleted Content added
rephrased; Why not use the Anglo-Saxon "before" instead of the Latin idiom "prior to"? Does "prior to" sound more clever or trendy? |
Added a link to “counterfeit banknote” to link to “counterfeit money” Tags: Visual edit Mobile edit Mobile web edit |
||
Line 2:
==Background==
[[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 |accessdate= 2008-03-28}}</ref> The chemical properties of US banknotes before 1960 make marking pens useless.<ref>{{cite web
| |||