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Boro Room -- For Boro-related tips, techniques, and questions. |
2013-07-18, 3:15pm
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Member
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Join Date: Jan 12, 2012
Posts: 79
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Annealing?
If i blow a small bubble and completely close it up... like you might make for a christmas ornament.
Then i let it cool and then put it in my kiln to anneal.... is it going to explode in the kiln when it gets hot and the air inside cant excape?
or will it not get hot enough to blow itself to pieces?
i really need to know because i have a hundred ornaments that need annealing but i am afraid i cant put them in the kiln....
what to do???
Khan
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2013-07-18, 4:06pm
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kinda torching....
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Join Date: Mar 26, 2013
Location: Pennsylvania
Posts: 301
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I'd try one that doesn't mean much, and also, all the glass ornaments I've seen are open at the top.
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2013-07-18, 4:31pm
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Borovangelist
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Join Date: Jan 26, 2007
Location: Auburn, MA
Posts: 3,002
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I actually had a sealed one blow up in my kiln once, scared the poo out of me when it happened, but I was glad for that nice thick door.
If they're consistently thin enough, sealed ones usually don't get annealed.
Like suggested, though, try with your least favorite
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-Tom
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2013-07-18, 7:32pm
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Senior Member
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Join Date: Mar 07, 2011
Location: Northern California
Posts: 2,023
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Why not leave a tiny hole? It is always a good practice if its possible.
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2013-07-19, 9:15am
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Member
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Join Date: Jan 12, 2012
Posts: 79
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Well i do sometimes take the time to try to leave a hole but it is a pain in the tail to have to do that.
So sometimes i just dont. I do usually flame anneal them but still ive had some just sitting there for like a few days and i find them broken... and i can see it was from stress and the thing just cracked on its own. I have even hung them up and come in a few days later and find half of it on the table under where it is hanging.
I can use a pick and make a hole after they are made but damn... i spend all that effort to make them nice and symmetrical and perfect then i start pushing a hole in and of course that distorts things.
Its just a pain to try to make a hole and not ruin something cause there is really no good place to make it. I will see if i have a picture to post and show you what i mean.
Khan
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2013-07-19, 9:23am
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Senior Member
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Join Date: Mar 14, 2012
Location: Bennington, VT
Posts: 1,776
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tiny hole with tunsten pick is all that is needed.
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2013-07-19, 9:36am
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Member
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Join Date: Jan 12, 2012
Posts: 79
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Stuff like this
This is not my work but i didnt have a pic of mine but they are very similar to this one.
So, where is a good place to leave a hole??? the end?? it is hardly big enough on the end. But i have opened the ends of some.
I could make a small hole where the bubble meets the narrow part. Thats when i have heated just a point and made the hole with a hot pic. But it usually distorts around that spot and looks bad.
Its a real pain. Im so tired of finding the best ones broken from stress.
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2013-07-19, 9:40am
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Member
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Join Date: Jan 12, 2012
Posts: 79
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Istand,
The smallest tungston pic i have is 1/8"... well that is actually as big as the end of the thing. So yea i can make the hole on the end but it makes the end more like 5/16" rather than the nice looking 1/8". That is the problem with the tungston pic.
Khan
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2013-07-19, 10:32am
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Queen Bee
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Join Date: Oct 26, 2008
Location: Ellington, CT
Posts: 1,253
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Hmmm, this is very interesting. I just blew an ornament at the Corning Museum of Glass, and it was large and completely closed up at the top with a glob of clear and a loop. It had a very thick wall. They immediately popped it right into the kiln. They shipped them to us the next day, and they look great, and no hole whatsoever, but are incredibly heavy because of the thick wall. They were cranking out ornaments every 6 minutes with folks. I wonder what they do different to not have anything explode?
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2013-07-19, 11:57am
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Member
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Join Date: Jan 12, 2012
Posts: 79
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aahhhh Donna... now that tells me something
Maybe if i anneal in the kiln as soon as its finished before it cools... just stick it right in the kiln...
Maybe ... just maybe that would be what i need to do...and forget about doing them all at once ...later.
Thanks Donna
Khan
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2013-07-19, 8:00pm
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Senior Member
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Join Date: Mar 07, 2011
Location: Northern California
Posts: 2,023
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Quote:
Originally Posted by khan
Well i do sometimes take the time to try to leave a hole but it is a pain in the tail to have to do that.
So sometimes i just dont. I do usually flame anneal them but still ive had some just sitting there for like a few days and i find them broken... and i can see it was from stress and the thing just cracked on its own. I have even hung them up and come in a few days later and find half of it on the table under where it is hanging.
I can use a pick and make a hole after they are made but damn... i spend all that effort to make them nice and symmetrical and perfect then i start pushing a hole in and of course that distorts things.
Its just a pain to try to make a hole and not ruin something cause there is really no good place to make it. I will see if i have a picture to post and show you what i mean.
Khan
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When i blow ornaments i leave a hole right at the top where i apply the hook.
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2013-07-20, 1:20pm
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Member
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Join Date: Jan 12, 2012
Posts: 79
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Larry... so how do you keep from closing the hole when you put on the hook?
I have tryed to do that but i always wonder if the hole got closed.
Khan
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2013-07-21, 3:58pm
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Now part of the Dark Side
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Join Date: Jul 02, 2010
Location: North Central PA
Posts: 966
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I think he means to pop a small hole nextto the hook. I could be wrong.
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Roy
Hot glass does not crack.
Unless it is glowing and drippy, hot glass looks like cold glass.
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