WHAT IS IT
This pen is not actually made for writing, but for detecting counterfeit money. With one swipe, you can easily discover whether any US bill is fake or real, and also reveal a vast effort
to secure the supply chain for US bills—all the way down to the raw materials. So how does it work? The ink, an iodine solution, reacts differently depending on the composition of the paper. If it’s revealed to be wood-based, the marker’s ink reacts to the starch and turns black. If it’s fiber-based (a real dollar is composed of cotton and linen), it appears as the marker’s original color, gold.
• In effort to thwart counterfeit money made of the same materials, the supply of cotton and linen used in US money has been closely guarded and produced by a single company since 1770.
• Another interesting anti-counterfeit measure is the EURion constellation, seen below. Scanners recognize this arrangement of dots to prevent photocopying. Try scanning this card!
• Find out if you have any counterfeit cash.