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.
SOS SS United States - It's now or never to try to save the fabulous SS United States from the breaker's yard. The downside is the cost of an refit for commercial use, but the u...
6 hours ago