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Slumping large pieces in Paragon Pearl 56
Posted: Wed Nov 11, 2015 1:25 pm
by mary matchael
I have cracked two large pieces slumping them over a stainless steel mold. My question is should I take the kiln shelf out when slumping to expose the elements in the bottom of the kiln?
Re: Slumping large pieces in Paragon Pearl 56
Posted: Wed Nov 11, 2015 2:15 pm
by Valerie Adams
You'll want to post your full schedule in order to get the best help.
How far is your glass from the top element?
How tall is your stainless mold?
Re: Slumping large pieces in Paragon Pearl 56
Posted: Wed Nov 11, 2015 3:11 pm
by Bert Weiss
Your glass is probably cracking due to thermal shock. Slow down.
Re: Slumping large pieces in Paragon Pearl 56
Posted: Sun Nov 15, 2015 9:58 pm
by Morganica
As Val said, need schedule, and it wouldn't be a bad idea to either show a picture of the mold and the piece(s), or to at least describe the shape and the sizes/heights. Lots of possibilities here. Depending on the proximity of the glass to the elements as the glass starts to heat, there could be a number of problems.
If the glass is really close to the elements you might not be able to slow down sufficiently, so the solution could actually be the opposite of removing a shelf: You may actually need to "baffle" or insulate the glass from the elements to prevent that part of the glass that's closest to the elements from heating too quickly.
But there's no way to tell without more info...