eye protection for melting recycled bottle glass

@miniuniworld · #1 2012-11-05, 2:41pm

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!

lysa · #2 2012-11-05, 4:02pm

Safety glasses for soft glass will work just fine

Sue in Maine · #3 2012-11-05, 4:05pm

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.

Sue

@miniuniworld · #4 2012-11-05, 7:01pm

great! Thanks!

Can frit be used on bottle glass?

Sue in Maine · #5 2012-11-05, 7:19pm

Quote:

Originally Posted by @miniuniworld

great! Thanks!

Can frit be used on bottle glass?

No. I wouldn't take the chance. The COE's will vary too much.

Sue

@miniuniworld · #6 2012-11-05, 10:35pm

okay thanks!!

Dragonharper · #7 2012-11-06, 4:37am

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.

@miniuniworld · #8 2012-11-06, 5:10pm

Quote:

Originally Posted by Dragonharper

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!

Dragonharper · #9 2012-11-06, 5:39pm

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.

RSimmons · #10 2012-11-06, 6:05pm

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

@miniuniworld · #11 2012-11-06, 6:05pm

got it! Thanks! =) learning something new everyday!

Polgarra · #12 2012-11-06, 6:07pm

Quote:

Originally Posted by RSimmons

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.

@miniuniworld · #13 2012-11-07, 10:20am

while we are on the topic of recycled glass....

Dragonharper · #14 2012-11-07, 10:28am

Thanks Robert, I wasn't sure if it crystallized or not.

shirts · #15 2012-11-25, 1:38pm

Quote:

Originally Posted by Dragonharper

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.