Blistering on Stoneware

Hi, I've only been at this ceramics game for fifteen years so i'm also
still learning.
I don't know if this will be of any help but; I recently had similar
problems with a low fire(1100c) glaze and found the problem to be a too
rapid firing.

plodder wrote:
Hi, I've only been at this ceramics game for fifteen years so i'm also
still learning.
I don't know if this will be of any help but; I recently had similar
problems with a low fire(1100c) glaze and found the problem to be a too
rapid firing.

That makes sense in that the offgassing from the body that can cause the
blisters is more likely to be finished or greatly reduced with a slow
firing--it's also a reason for a higher (cone O5 at least) bisque. In
my case, however, it was happening even before I changed the elements,
when the kiln was firing much slower, and doesn't seem to be worse for
the faster firing new elements gives it.
Brad

--
For my pottery how-to videos, original art, music, pottery, and
literature, visit my homepage
http://sondahl.com

Man, Brad, that is a WONDERFUL site you have. Very, very helpful. Great
tips.

Thanks,

Tom


"Brad Sondahl" wrote in message
news:9Au8f.38$sF6.9@trnddc03...
plodder wrote:
Hi, I've only been at this ceramics game for fifteen years so i'm also
still learning.
I don't know if this will be of any help but; I recently had similar
problems with a low fire(1100c) glaze and found the problem to be a too
rapid firing.

That makes sense in that the offgassing from the body that can cause the
blisters is more likely to be finished or greatly reduced with a slow
firing--it's also a reason for a higher (cone O5 at least) bisque. In my
case, however, it was happening even before I changed the elements, when
the kiln was firing much slower, and doesn't seem to be worse for the
faster firing new elements gives it.
Brad

--
For my pottery how-to videos, original art, music, pottery, and
literature, visit my homepage
http://sondahl.com