Hi all,
Many times I've heard people say that SCA or purple glass is pre 1915 or WWI, as manganese (used as a decolorizer) became difficult to obtain. Then Selenium was used as a decolorizer. Generally, this is true, but certainly not ALL purple glass is pre WWI. ANY age glass that contains manganese will turn purple when irradiated or exposed to intense UV or prolonged sunlight.
Here are two examples, from 2 different companies, made between 1942-1960:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300101812390
Bob
Many times I've heard people say that SCA or purple glass is pre 1915 or WWI, as manganese (used as a decolorizer) became difficult to obtain. Then Selenium was used as a decolorizer. Generally, this is true, but certainly not ALL purple glass is pre WWI. ANY age glass that contains manganese will turn purple when irradiated or exposed to intense UV or prolonged sunlight.
Here are two examples, from 2 different companies, made between 1942-1960:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300101812390
Bob
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