COE of non-tested BE? - WarmGlass.com

COE of non-tested BE?

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Marilyn Kaminski
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COE of non-tested BE?

Postby Marilyn Kaminski » Tue Jan 27, 2004 11:19 am

I have a bunch of scrap BE that I'd like to use for fusing. Does the non-tested BE tend to be COE90, or is it more random? Specifically I'm looking at 0301 (pink opal) but also wondering in general.

(I know, I should test it myself ... but the magless deadline is getting
closer!)

Thanks -- Marilyn

Barbara Muth
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Postby Barbara Muth » Tue Jan 27, 2004 11:22 am

Marilyn, I don't think there is any way to know without testing each scrap to make sure it is compatible.

Barbara
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Brad Walker
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Postby Brad Walker » Tue Jan 27, 2004 11:33 am

Barbara Muth wrote:Marilyn, I don't think there is any way to know without testing each scrap to make sure it is compatible.


Agreed. The glass will tend to be around 90 coe, but that doesn't mean the particular piece you have will be 90.

Marilyn Kaminski
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Location: Boulder, CO

Postby Marilyn Kaminski » Tue Jan 27, 2004 12:24 pm

Rats. I was afeared that would be the answer. Thanks for the quick responses, I'll make room for a test in tomorrow's kiln load.

- Marilyn

Paul Tarlow
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Re: COE of non-tested BE?

Postby Paul Tarlow » Tue Jan 27, 2004 12:54 pm

Marilyn Kaminski wrote:I have a bunch of scrap BE that I'd like to use for fusing. Does the non-tested BE tend to be COE90, or is it more random? Specifically I'm looking at 0301 (pink opal) but also wondering in general.

(I know, I should test it myself ... but the magless deadline is getting
closer!)

Thanks -- Marilyn


The way it was explained to me is that compatible and non-compatible glass will come from the same run. The glass that tests compatible is labeled and sold such.

If that's true, then the implication is that the glass not labeled compatible is unlikely to fit COE 90 because it actually tested not compatible.

Someone from BE would need to verify this. I can't remember who told me...or if, perhaps, I dreamed it.

- Paul

Tony Smith
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Re: COE of non-tested BE?

Postby Tony Smith » Tue Jan 27, 2004 1:04 pm

Paul Tarlow wrote:If that's true, then the implication is that the glass not labeled compatible is unlikely to fit COE 90 because it actually tested not compatible.- Paul


Maybe not. What is their criteria for "not-compatible"? Don't they test every tenth sheet? If so, then adjacent sheets might be compatible and not-compatible.

Tony
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Brock
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Re: COE of non-tested BE?

Postby Brock » Tue Jan 27, 2004 1:08 pm

Paul Tarlow wrote:
Marilyn Kaminski wrote:I have a bunch of scrap BE that I'd like to use for fusing. Does the non-tested BE tend to be COE90, or is it more random? Specifically I'm looking at 0301 (pink opal) but also wondering in general.

(I know, I should test it myself ... but the magless deadline is getting
closer!)

Thanks -- Marilyn


The way it was explained to me is that compatible and non-compatible glass will come from the same run. The glass that tests compatible is labeled and sold such.

If that's true, then the implication is that the glass not labeled compatible is unlikely to fit COE 90 because it actually tested not compatible.

Someone from BE would need to verify this. I can't remember who told me...or if, perhaps, I dreamed it.

- Paul


That's right Paul.

Out of a days production, which is all tested every 10 sheets . . .

Compatible is compatible..

Non-compatible is non-compatible.

I think Bullseye would love to make EVERY sheet compatible, it commands a higher price, but the start of a run (10 - 20%?) and the end of the run (another 20%+?) are not compatible, for whatever glass chemistry reason. Go by the labels. Simple really. Brock
My memory is so good, I can't remember the last time I forgot something . . .

KellyG
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Postby KellyG » Tue Jan 27, 2004 2:42 pm

I've lucked out more times than not on getting compatible "Non-compatible" BE and Spectrum. I've found VERY FEW that weren't compatible, but I ALWAYS tested first.

...Kelly

KellyG
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Postby KellyG » Tue Jan 27, 2004 2:51 pm

Just as an aside, I work for a chemical plant. We produce one product that is sold at one price to one market, but we sell the exact same product (NO additives) at a much higher price, but to a different market. We can do this legally because they're sold to different markets.

Gambling on this logic, I ordered approx. $1K of untested BE and found that all was compatible. The drawback is I still have to do the testing.

...Kelly

Marilyn Kaminski
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Postby Marilyn Kaminski » Tue Jan 27, 2004 6:49 pm

But now I've learned that they only test 1-in-10, so if I see a sheet that's got that distinctive corner-cut but isn't marked compatible, I'll definitely know to NOT pick that sheet.


The reason that they only test every nth sheet is that they are looking for the change from compatible to non-compatible or the reverse. The premise here -- and it must be a good one because you don't hear any complaining about getting non-compatible glass marked as compatible -- is that if the 50th sheet and the 60th sheet are both compatible then sheets 51 - 59 are also compatble.

- Paul

starchimes (Andrea)
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Postby starchimes (Andrea) » Wed Jan 28, 2004 11:52 am

I have had good luck using bullseye that was not certified compatible (except ring mottled). I have used the 0301 and it worked great. But, I would still run a test just to be on the safe side.

Andrea


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