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Pegasus Lampwork
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Author Topic: Help, what temperature to bend my pendant the right way  (Read 451 times)
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jobead
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« on: August 20, 2009, 10:22:16 PM »

I've made a PMC3 pendant but stupidly left it loop side down so it sunk in the middle. I know you can re fire PMC so I have tried that ( a couple of times) using support to try to get it back to shape.

It is a little better but not sure if I need to crank up the heat. I'm firing for 20mins at 750 and I'm a bit worried about going higher as I don't know what is will stand.

Any idea much appreciated, it would be lovely it I hadn't b*llsed it up ! Embarrassed

Ta
Jo
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amareargentum
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« Reply #1 on: August 20, 2009, 10:48:45 PM »

You can certainly go a bit higher. I generally fire my silver clay at 800C. I believe that the absolute maximum is 899C - see the quote from the Metal Clay forum

"But again, those are minimum requirements. In general, you want to
fire at the hottest possible temperature, which if you're using PMC3
without any inclusions (such as gemstones or glass) is 1650F. You can
fire at that temperature for 10 minutes, or if you're making something
that requires maximum strength, like a ring, then fire for the maximum
recommeded time of 2 hours."

I have had a similar problem and managed to straighten it out a good bit (not quite perfect though).

Hope that helps - good luck!
Amanda
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ebj
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« Reply #2 on: August 20, 2009, 11:44:05 PM »

Try hammering it on a steel block to get it back into shape.

I fire my clay too at 800. But I'm not sure it will make that much difference, Hammer it. That will work. But do it on a steel block.

Hope that helps.     
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Emma

Art Clay Senior Instructor & Lampworker

www.emmabaird.wordpress.com
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« Reply #3 on: August 21, 2009, 11:33:28 AM »

I'd say the same as Emma, hammer it back into shape.  I use a leather mallet and steel block.

I did the same as you once, it's something you only do once  Grin

I fire all of my pieces at 800 for 2 hours (or longer if I forget about them  Grin) and silver doesn't melt until after 900 so you will be fine, but I think you'll find it quite hard to get it to bend back the other way.

The piece that I slumped I ended up leaving cos it looked quite nice in the end!

Becci
xx
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jobead
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« Reply #4 on: August 21, 2009, 10:36:07 PM »

Thanks everyone, your right I won't make the same mistake again. It's seems so obvious now but I was so keen to get it in the kiln I turned my brain off.

Might try it a bit higher and then give it a wallop.

Cheers
Jo
 Grin
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