(Quoted from Wim Zoomer and Screenweb.com. Full article here.)

We all use paper money – banknotes, as we say in Europe – and surely every reader of Screen Printing understands that the currency we use is printed somehow by someone, somewhere. As you might expect, those details are among the most sensitive, carefully guarded secrets in all of printing. Since paper money is frequently subjected to counterfeiting attempts, banknote printers use very sophisticated technology to thwart these efforts.

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