Craig Martell on mon 24 jul 00
At 07:22 PM 07/24/2000 +0100, Phil said:
>I'm really very grateful for your comments, thank you.
You're quite welcome Phil. I can only hope that I've helped in some
way. As you well know vapor glazing can be a very dicey business at
times. I only wish that I could fire my salt kiln more than I do. Most of
my work is the ashglaze porcelain that sells well and keeps me in the black.
>It is often the case that these slips will fire beautifully under the
>footring of a bottle or bowl where thay are hidden away from the
>salt/carbon whatever!
I see this a lot in my kiln as well. A light salt is just about right to
not dissolve the iron on the surface of the pot and leave that nice orange
blush. A lot of folks here used to fire with just residual salt now and
then with Avery Kaolin pots or other porcelain and white stoneware clays
and get orange flashing all through the kiln.
>I often fire small bowls in stacks seperated by
>cockle shells. The inner mosr surfaces, can and often are, a stunning
>orange with a satin surface.
Perhaps this effect can be encouraged by stacking selected shapes very
close together in the kiln to protect areas on the individual pots from
getting too much salt.
> What exactly is it in the atmosphere within the main draft of the salt
> and heat from the fireboxes that matts up and discolours the surface.
I wish I had an answer for that. Perhaps pots in this area of the kiln
need some sort of baffle to protect them from whatever it is that causes
the mattness and color that you don't prefer.
>Did i mention that i have a small gas/salt kiln and the same slips in that
>are perfectly O.K.
No, I don't think that you mentioned the smaller kiln. I saw the new
larger salt kiln that you were just finishing prior to your departure for
Korea about 2 or more years ago. Well, if you can sort out what the
differences in the two kilns are, you will most likely solve the
problem. I hope that you do!!
regards, Craig Martell in Oregon
philrogers on mon 24 jul 00
Craig,
I'm really very grateful for your comments, thank you.
It is often the case that these slips will fire beautifully under the
footring of a bottle or bowl where thay are hidden away from the
salt/carbon whatever! I often fire small bowls in stacks seperated by
cockle shells. The inner mosr surfaces, can and often are, a stunning
orange with a satin surface. What exactly is it in the atmosphere within
the main draft of the salt and heat from the fireboxes that matts up and
dicscolours the surface. Did i mention that i have a small gas/salt kiln
and the same slips in that are perfectly O.K.
Thanks again for your help,
Phil.
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