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| Boro Room -- For Boro-related tips, techniques, and questions. |
2011-04-11, 9:20am
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Senior Member
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Join Date: Jun 27, 2005
Location: Wellington, CO
Posts: 1,091
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Will my pendants crack?
My relay went out on my kiln but I'm dying to make something today. Can I use a fiber blanket or vermiculite with boro pendants or am I just asking for disaster?
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Dawn
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2011-04-11, 9:29am
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Senior Member
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Join Date: Apr 15, 2009
Location: Far side of the screen
Posts: 412
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Their are lots of variables to consider there, but for the most part if they are not too large you should be fine. Be sure to batch anneal them later though.
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2011-04-11, 10:13am
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Playing with Fire!
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Join Date: Feb 23, 2007
Location: Rockland, Maine
Posts: 192
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You should be fine with most pendants, unless they are huge. Just put them between the frax when the glow is gone, and be careful not to uncover partly cool ones when you add new work. When I don't have a kiln handy, I usually work into 2 strips about 4" x 12", start in the middle, and work my way first to one end, and then the other. I hold a hand down on the frax over the work previously placed there as I lift up the end to place the next one. At the end of the day, just place them all in a cold kiln, ramp up over 45 min to an hour and anneal.
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Playing with Fire!
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2011-04-12, 5:46am
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Senior Member
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Join Date: Sep 08, 2005
Location: Beautiful Colorado
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Hey, Dawn ~ Sorry! Will I see you at RMBS? We are in booth 112.
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Leslie
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2011-04-12, 6:12am
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Hobby Junkie
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Join Date: Dec 08, 2009
Location: Perkasie, PA
Posts: 1,967
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Boro is pretty resilient. I've already just put finished stuff in the cold kiln while I continued torching (no blanket or anything). I've never had things thermal crack.
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Cori C-R
PS - This is what part of the alphabet would look like if Q and R were eliminated.
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2011-04-12, 1:27pm
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Senior Member
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Join Date: Jun 27, 2005
Location: Wellington, CO
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Thanks everyone! I've been using a fiber blanket and it's worked just fine.
Leslie - I don't know if I'll make it down or not but I'll be sure to stop by and see you if I do!
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Dawn
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2011-04-13, 4:54am
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Pyromaniac
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Join Date: Jun 27, 2006
Location: Out there on the interwebs
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Dawn I'm not advising you to do this, but from doing various demos, I've found that most smooth, rounded pendants, like an implosion etc will usually bench cool on top of a bit of fiber blanket (or even on a piece of graphite (bad idea!!)) without cracking. I've not had the same luck with items that have more stress inherent, such as molded and/or complex forms, but even they crack less than you'd expect. Unless you try to rework them without first ramping them up in a kiln. Then it's usually KABLOOEY!
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Chris Scala
Fortune Cookie say, "When things go wrong, don't go with them!"
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2011-04-13, 8:50am
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ManBearPig
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Join Date: Jun 28, 2005
Location: Roanoke, VA
Posts: 8,540
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Don't try cooling them on graphite. Graphite sucks the heat out of glass (which is why it works for marvering).
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2011-04-14, 7:54am
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Pyromaniac
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Join Date: Jun 27, 2006
Location: Out there on the interwebs
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Yeah don't try that graphite thing - I should have probably mentioned that it was a bad idea - I mentioned it assuming people would understand that it was pretty amazing - but Cosmo's post makes me realize that a disclaimer should have been included - so I added one.
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Chris Scala
Fortune Cookie say, "When things go wrong, don't go with them!"
Current Glass-Melting Apparatus:
GTT Lynx powered by 2 5 LPM Oxycons and
a sexy Barracuda running pure tanked Oxy
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