Excellent article on how counterfeit detector pens work.
The pens detect the starch content in money. Regular paper has starch, currency paper doesn't.
Magician and skeptic James Randi uses an ironing product, spray starch, that makes genuine bills appear counterfeit. Then he returns the starched bills to the bank. Eventually someone will attempt to pass the genuine but starched bill, leading to police, siezed money, etc.
Steven Andrew Sayles 1964-2016 - Steven Andrew Sayles was born in Gander, Newfoundland on March 14, 1964 to Wayne G. and Sharon L. (Greshay) Sayles. As a child, Steve had an inquisi...
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