Banknote security

Banknote security

C013/2678 Rights Managed

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This image is part of the sequence science and technology: banknote security ultraviolet markers

Credit: SCIENCE PHOTO LIBRARY

Caption: Banknote security. Close-up of a UK twenty-pound sterling (20 GBP) banknote under visible light. This region of the banknote is where an anti-counterfeiting marker has been placed. The marker is only visible under ultraviolet (UV) light. The UV light causes chemicals in the marker to fluoresce, making the marker visible as it glows. The colours depend on the chemicals used. UK and Euro banknotes use compounds of the rare earth (lanthanide) elements europium and terbium. For this image in UV light, with the marker visible, see image C013/2679.

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Keywords: 20 pound note, 21st century, anti-counterfeiting, application, applications, bank note, bank of england, britain, british, cash, chemical, chemistry, close-up, detail, england, english, europe, european, europium, gbp, genuine, inorganic chemistry, lanthanide, lanthanides, manufactured, marked, marker, money, not fake, not visible, oxidation state, oxide, oxides, physical chemistry, physics, pound sterling, pounds sterling, produced, rare earth, rare earths, security feature, specimen, states, technological, technology, terbium, tracers, twenty pounds, uk, ultraviolet tracer, united kingdom, use, uses, uv, visible light

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