[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: money tracing
> The black ink that is used to print the front side of U.S. cash contains a
> very finely ground black iron oxide powder. The ink is magnetic. This
> magnetism is used mostly by vending & change machines to distinguish real
> bills from forgeries/photocopies.
> 3. Magnetic ink detection. Real bills are printed with magnetic
> ink, forgeries/photocopies are not.
Magnetic toner for laser printers does exist. Its purpose is to allow people
to print their own checks.