Banknote, UV anti-counterfeit marker

Rights Managed

SS2638239

SS1915

Banknote security, UV anti-counterfeit marker. Close-up of a UK five-pound sterling (5 GBP) banknote under ultraviolet (UV) light, revealing the anti-counterfeiting marker (in the form of the number 5) that is not seen under visible light. The UV light causes chemicals in the marker to fluoresce, making the marker visible as it glows. The colors depend on the chemicals used. UK and Euro banknotes use compounds of the rare earth (lanthanide) elements europium and terbium. For this image in visible light, see image C013/2674.

SPL / Science Source

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