A common design feature on banknotes today, intended to make counterfeiting more difficult. On euro notes, a narrow thread runs through the paper. When viewed against a light source, this appears dark. On genuine notes, the word “euro” and the bill’s value numeral are visible. – See banknote management, bridge-Abneysches phenomenon, chip card, counterfeit protection, window money, guilloche, super notes.
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University Professor Dr. Gerhard Merk, Dipl.rer.pol., Dipl.rer.oec.
Professor Dr. Eckehard Krah, Dipl.rer.pol.
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