Posts tagged 'postcode tagging'

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Which UV lamp do I need to detect phosphorous bands on stamps?

Phosphor is used for postcode tagging dots and on the postage stamps of Great Britain from the 1960's onwards. Is also present on stamps from Canada (older issues), Finland, Greece, Israel, Mexico (older issues) and the USA. Shortwave UV 254nm - 266nm is used to check for the presence of phosphorescence. A mini UV lamp is ideal for detection of phosphorous and Camlab have a range of lamps avai...

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