Banknote Security is a photograph by Science Photo Library which was uploaded on September 16th, 2018.
Banknote Security
Banknote security. Close-up of a UK twenty-pound sterling (20 GBP) banknote under visible light. This region of the banknote is where an... more
Title
Banknote Security
Artist
Science Photo Library
Medium
Photograph
Description
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.
Uploaded
September 16th, 2018
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