A new way to thwart counterfeiters
The new U.S. $100 bill will have a “security thread” that contains a microscopic optical device. This article describes the new device:
Currency change aimed at adding security
According to the article: “The operation of the new security thread looks like something straight out of the Hogwarts School of Witchcraft and Wizardry. This magic, however, relies on innovations produced from decades of development. It combines micro-printing with tiny lenses — 650,000 for a single $100 bill. The lenses magnify the micro-printing in a truly remarkable way. Move the bill side to side and the image appears to move up and down. Move the bill up and down and the image appears to move from side to side.”
Several countries are already using the technology, and it should appear in the U.S. in 2008. For more information see:
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