Postal Pleasures Presents: How To Use UV Light To Detect Tagging On Collectable Postage Stamps – Stamp Collecting Tools EP4. Having covered the most common tools needed by a philatelist, Postal Pleasure now looks at the nest most common device he utilises, his ultraviolet light.
The model he looks at is the Lighthouse Brand Dual Wave Ultra Violet Lamp, Long Wave-Short Wave Switchable. UV light can be used to detect different levels of Florescence or Phosphorescence in the stamp paper. It can also be used to detect color varieties of rare stamps. In particular Ultra Violet Lamps are often used in German stamp collecting
The wavelength of the UV light is important. US stamps require shortwave lights but some countries require long wave UV light. The light he uses is made specifically for stamp collecting and has selectable 254 nanometer Shortwave and 380nm longwave lightbulbs.
Great but – what does tagged mean? What does it mean in terms of value?? explain more maybe…