Glass Identification - Post here for all ID requests > Glass
Should this piece of art glass be on another board for ID?
Sklounion:
It should change simply between artificial (either standard bulbs or fluorescent) and natural light sources.
I cannot comment on black-light (UV), as I never use it.
If it does change, in the light of Lustrousstone's comment above, then among the prime candidates will be Zelezny Brodske Sklo or ZBS, located in the Czech Republic.
Regards,
Le Casson
Lustrousstone:
No Marcus. It will be the same in daylight as under incandescent (ordinary light bulbs and halogens) sources when it will be purple, but different under fluoresent (strips and low-energy) sources when it will be blue. I always have to check using my little lilac cat.
Sklounion:
Doh.....
I knew I'd get it wrong :-[
Regards,
Marcus
Martin Brown:
--- Quote from: Lustrousstone on January 12, 2007, 07:32:28 AM ---It should change to blue under a fluorescent light because it looks to me to be neodymium glass
--- End quote ---
I agree. A quick diagnostic test for distinguishing neodymium glass is to look at a solar reflection spectrum from a shovelware CD. When you interpose the glass it will filter out all the yellow light with a weaker absorption line in the green.
If you have low pressure sodium street lighting the effect of look at them through neodymium glass is startling (just like glass workers goggles it blocks the bright yellow sodium D-lines).
The result of this very strong minus-yellow filtration is that the piece will look very different even grey under sunlight, pink under warmer incandescent lights and almost green under fluorescents.
Regards,
Martin Brown
Connie:
loveglass - Where are you located? US? UK?
Several US companies made similar pieces in neodymium glass also - most notably US Glass/Tiffin. I am not saying it isn't Czech but there are other possibilities.
Could you please show a picture of it from the side - straight on - 90 deg.?
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