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Author Topic: Should this piece of art glass be on another board for ID?  (Read 1159 times)

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Offline loveglass

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Should this piece of art glass be on another board for ID?
« on: January 12, 2007, 04:45:48 AM »
I have no idea who could have made this piece of art glass but it is to beautiful to go without getting noticed. Maybe it is just a cheap knockoff by some unknown. Anybody have any ideas? It is 91/2" tall and about 11" long. TIA :)




Offline loveglass

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Re: Should this piece of art glass be on another board for ID?
« Reply #1 on: January 12, 2007, 04:50:21 AM »


Sklounion

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Re: Should this piece of art glass be on another board for ID?
« Reply #2 on: January 12, 2007, 05:50:36 AM »
Hi,
Is this dichroic glass? Changes colour in different lighting conditions?
I know where the colour tells me this is from, as well as the finished foot, but will hold back until you indicate whether the above property exists.
Regards,
Le Casson


Offline loveglass

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Re: Should this piece of art glass be on another board for ID?
« Reply #3 on: January 12, 2007, 06:16:11 AM »
I thought the same thing but I don't remember what colors it should change to or what light. For exameple taking it from indoor light to the outside should that make it change? Or putting under a black light would that make it change also? What colors schould to? Thanks for your help can't wait to hear back from you.


Offline Lustrousstone

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Re: Should this piece of art glass be on another board for ID?
« Reply #4 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


Sklounion

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Re: Should this piece of art glass be on another board for ID?
« Reply #5 on: January 12, 2007, 07:38:54 AM »
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


Offline Lustrousstone

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Re: Should this piece of art glass be on another board for ID?
« Reply #6 on: January 12, 2007, 07:48:49 AM »
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

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Re: Should this piece of art glass be on another board for ID?
« Reply #7 on: January 12, 2007, 08:03:08 AM »
Doh.....
I knew I'd get it wrong :-[
Regards,
Marcus


Offline Martin Brown

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Re: Should this piece of art glass be on another board for ID?
« Reply #8 on: January 12, 2007, 08:54:29 AM »
It should change to blue under a fluorescent light because it looks to me to be neodymium glass

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

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Re: Should this piece of art glass be on another board for ID?
« Reply #9 on: January 12, 2007, 09:02:24 AM »
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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