Page 1 of 1
Annealing stress test
Posted: Thu May 31, 2012 3:37 pm
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!
Re: Annealing stress test
Posted: Thu May 31, 2012 3:40 pm
by Brock
It applies to stress, however induced.
Re: Annealing stress test
Posted: Thu May 31, 2012 3:59 pm
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...
Re: Annealing stress test
Posted: Thu May 31, 2012 4:55 pm
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.
Re: Annealing stress test
Posted: Thu May 31, 2012 5:19 pm
by sashaz
That is great! Thank you again.
Re: Annealing stress test
Posted: Thu May 31, 2012 7:05 pm
by Morganica
Yep. One thing: It doesn't work all that well on opaque glass...
Re: Annealing stress test
Posted: Thu May 31, 2012 9:50 pm
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
Re: Annealing stress test
Posted: Fri Jun 01, 2012 12:38 am
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.
Re: Annealing stress test
Posted: Fri Jun 01, 2012 3:10 am
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