luminescent
The condition of a stamp or postal stationery which has been treated with chemicals which are sensitive to and glow under ultraviolet (UV) light.
"Luminescent" refers to a substance that glows when exposed to UV light. If the luminous coating or ink on a stamp continues to glow for a short time when the UV light is switched off, then the coating on the stamp is phosphorescent.
Luminescent Stamps, by Alfred G. Boerger, one of the pioneers of the study of tagging on U.S. issues, is an informative collection of statistics, definitions, and advertisements. Mr.
Papper, Luminiscerande: (Swed.) luminescent paper.
Papper, Maskingjort: (Swed.) machine-made paper.
Papper, Medeltjockt: (Swed.) medium-thick paper.
Papper, Mjukt: (Swed.) soft paper.
Papper, Räfflat: (Swed.) ribbed paper.
U.S. stamps have various styles of luminescents, and Scott minor varieties are often distinguished by the specific luminescent methods used. See Luminescence article by Victor Bove.
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Make-Up Rate Stamps ...
An experimental paper where a luminescent additive was added to the furnish to facilitate the automation of the facing and cancelling operation.
U.S. SC#2115b
Toned ...
Phosphor, otherwise known as the “invisible ink', is luminescent when struck with an ultraviolet light.
This also might include collecting stamps in which something went wrong in production: errors, freaks, and oddities. Studying watermarks takes special fluids and lighting equipment, also needed to study the luminescent inks used on modern stamps to ...
Local - A postage stamp authorised for use only within a limited territory.
Luftpost - (German) Airmail.
Luminescent - The condition of a stamp which has been treated with chemicals which are sensitive to, and glow under, ultraviolet light.
 See also: Stamp, Printing, Used, Machin, Catalog
  
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