Annealing stress test

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sashaz
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Annealing stress test

Post by sashaz »

Hello,

I am working on a tack fused panel (16"x 35") and I would like to make sure that after it's fired there is not residual annealing stress in the glass. I saw polarized lens test being mentioned as a way to detect stress, but I wonder if it applies to annealing stress as well as to incompatibility stress or to the last one only.

Thank you!
Brock
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Re: Annealing stress test

Post by Brock »

It applies to stress, however induced.
sashaz
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Re: Annealing stress test

Post by sashaz »

Brock,
thank you for the fast reply.
On a large piece as mine (16"x 35") I probably need some special equipment to conduct it properly otherwise it would be hard to move two pieces of polarized film on two sides of panel...
Brock
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Re: Annealing stress test

Post by Brock »

No, you're okay. Sit the piece up on blocks on top of a light source and just move the films around to check areas. One on top, one on the bottom, and hold the films so that you have the darkest possible configuration.
Last edited by Brock on Thu May 31, 2012 5:22 pm, edited 1 time in total.
sashaz
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Re: Annealing stress test

Post by sashaz »

That is great! Thank you again.
Morganica
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Re: Annealing stress test

Post by Morganica »

Yep. One thing: It doesn't work all that well on opaque glass... ;-)
Cynthia Morgan
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GuyKass
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Re: Annealing stress test

Post by GuyKass »

And if you need to buy the material, this is a great place to do so...

http://www.polarization.com/polarshop/

(I am nothing more than a satisfied customer)

Guy
Rick Wilton
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Re: Annealing stress test

Post by Rick Wilton »

If anyone needs polarized film but doesn't want to "Buy" it, many of the 3D glass are made with polarized film. The new IMAX 3d glasses give you two rather large pieces that'll work great for stress tests.
Rick Wilton
Lauri Levanto
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Re: Annealing stress test

Post by Lauri Levanto »

Brock wrote:No, you're okay. Sit the piece up on blocks on top of a light source and just move the films around to check areas. One on top, one on the bottom, and hold the films so that you have the darkest possible configuration.
A minor addition. Can you position the 'back' polarized film on the light source.
Then you need only to move the other.
I hate gymnastics
-lauri
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