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.
Progress on HR 1493 - The Senate Foreign Relations Committee has passed a much modified version of HR 1493, a bill designed to protect cultural property in times of war and civi...
1 week ago