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.
East Asian department updated in Mantis
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Last week, the East Asian department of the American Numismatic Society
(over 51,000 objects) was migrated into the new CollectiveAccess curatorial
datab...
1 day ago
1 comment:
The amazing randi sounds like an amazing jerk.
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