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Safety -- Make sure you are safe!

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  #1  
Old 2012-11-05, 2:41pm
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Default eye protection for melting recycled bottle glass

Hi

Can anyone please tell me if Didy's are good enough for melting bottle glass? or do i need glasses used for boro?

Thanks!
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  #2  
Old 2012-11-05, 4:02pm
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Safety glasses for soft glass will work just fine
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  #3  
Old 2012-11-05, 4:05pm
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Didy's are fine. Treat bottle glass as if it was AROUND a COE 90-- that's a memory call and I'll be the first to say I'm getting old. Don't mix bottles. Even 2 that look alike may have come from different batches of glass and can be incompatible. Surface decorate with stringers you pulled from the bottle but do not mix bottles.

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  #4  
Old 2012-11-05, 7:01pm
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great! Thanks!

Can frit be used on bottle glass?
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  #5  
Old 2012-11-05, 7:19pm
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Quote:
Originally Posted by @miniuniworld View Post
great! Thanks!

Can frit be used on bottle glass?
No. I wouldn't take the chance. The COE's will vary too much.

Sue
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  #6  
Old 2012-11-05, 10:35pm
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okay thanks!!
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  #7  
Old 2012-11-06, 4:37am
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If I recall correctly my research showed that bottle glass was between 80-90 COE. Also bottle glass has a much narrower working range than 104 or even boro, that's the way it's designed. It doesn't devit like boro, it just stops moving.
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Old 2012-11-06, 5:10pm
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Originally Posted by Dragonharper View Post
If I recall correctly my research showed that bottle glass was between 80-90 COE. Also bottle glass has a much narrower working range than 104 or even boro, that's the way it's designed. It doesn't devit like boro, it just stops moving.
Hi... What's devit? and what does it mean when it just stops moving?

thanks!
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Last edited by @miniuniworld; 2012-11-06 at 5:13pm.
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  #9  
Old 2012-11-06, 5:39pm
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Devit = Devitrification. If you force the glass to move before it's ready it will devitrify. It gets a frosty look to it. I'm not sure what it does structurally to the glass but it doesn't look nice. With boro you can usually just reheat and fire polish it out.
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Old 2012-11-06, 6:05pm
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In strict terms 'devitrification' means that a crystal structure develops in the glass. It gives a frosted look to the surface and can degrade the structural integrity of a piece. The 'Devit' in boro is very often simply a wrinkling of the surface that has cooled more quickly than the inside, not true devitification, so it can be fire polished out. It looks similar but is actually quite different.

Robert
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  #11  
Old 2012-11-06, 6:05pm
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got it! Thanks! =) learning something new everyday!
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  #12  
Old 2012-11-06, 6:07pm
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Quote:
Originally Posted by RSimmons View Post
In strict terms 'devitrification' means that a crystal structure develops in the glass. It gives a frosted look to the surface and can degrade the structural integrity of a piece. The 'Devit' in boro is very often simply a wrinkling of the surface that has cooled more quickly than the inside, not true devitification, so it can be fire polished out. It looks similar but is actually quite different.

Robert
Thanks. I was gonna ask if the terminology differed between soft and boro.
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  #13  
Old 2012-11-07, 10:20am
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while we are on the topic of recycled glass....

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  #14  
Old 2012-11-07, 10:28am
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Thanks Robert, I wasn't sure if it crystallized or not.
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  #15  
Old 2012-11-25, 1:38pm
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Quote:
Originally Posted by Dragonharper View Post
If I recall correctly my research showed that bottle glass was between 80-90 COE. Also bottle glass has a much narrower working range than 104 or even boro, that's the way it's designed. It doesn't devit like boro, it just stops moving.
Well, I have managed to devitrify bottle glass... Must be really talented!
Annie.
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