any tips on firing a blank with a crack in it?

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dave laporta

any tips on firing a blank with a crack in it?

Post by dave laporta »

I have a 16 dia. BE clear blank that I cut this morning and as I pressed on the cut, a crack ran into my piece about 1" from the edge to the center. I think it fine to use but to avoid it running any further should I take extra care in my ramp up? My layup is single rolled glass on the bottom (a 2.5" black rim with another color inside) the the dble rolled clear w/crack on top of that then some lampworked stringers on top of the clear. And I have a side fire kiln. TIA for the help- dave
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Brock
Posts: 1519
Joined: Mon Mar 10, 2003 1:32 pm
Location: Vancouver, B.C.

Post by Brock »

Sometimes they run, sometimes they don't.
I would advise a VERY slow ramp up.
Brock
My memory is so good, I can't remember the last time I forgot something . . .
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dave laporta

Post by dave laporta »

how slow is very slow? 200dph or slower?
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Brock
Posts: 1519
Joined: Mon Mar 10, 2003 1:32 pm
Location: Vancouver, B.C.

Post by Brock »

Yeah, probably no faster than that. Hard to say, it depends on your kiln.
My memory is so good, I can't remember the last time I forgot something . . .
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cindyj

Crack in bottom layer

Post by cindyj »

I had the same happen last week. Two layers of BE clear with design elements on top. I put the cracked piece on the bottom (it was about 3/4 across a 10 inch circle) and fired slowly. Came out with no evidence of the crack to be found. I was suprised and pleased. One day I will but all my circles perfectly :lol:

Good luck
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