Gordon Ward on fri 31 aug 07
By cutting some pieces of soft brick into skew shapes and laying them
on the shelf in 2 rows about 3 inches apart, one can position plates
so that the lower part of the rim is supported in 2 places. This
evens the downward pressure on the rim and allows for warp free
bisque firing about a dozen plates stacked together on edge.
I always fired platters flat with 3 short posts in a triangular
pattern, originating from the shelf, and being careful to line the
posts up (with the aid of a cardboard template), stack about 5 - 6
platters, each with a set of posts carrying the weight straight down
to the shelf. I always had trouble with the bottom platter cracking,
so just reused an old cracked one on the bottom each time. Not sure
if the cracking had to with venting off the bottom of the kiln. I
suspect that it was the cause.
Gordon
On Aug 31, 2007, at 7:40 AM, Patty Kaliher wrote:
> She bisque fires them on their edges.
> Leaned against a piece of furniture against the side of the kiln,
> three
> deep. Says they do not warp or crack.
Gayle Bair on fri 31 aug 07
I made a bunch of clay balls about the size of marbles.
I'd use 3 on a plate and stack 3-5 plates for bisque firing.
I used this system for glaze firings placing 3 under the plate
this allowed for expansion, shrinking and more even temperature
on the bottom of the plate/platter during firing.
For platters I use more of them.
I found the angle of the rim important especially with B-Mix. It was
more likely to slump if it too close to being level.
Gayle Bair
Bainbridge Island, WA
Tucson, AZ
http://claybair.com
-----Original Message-----
From: Gordon Ward
By cutting some pieces of soft brick into skew shapes and laying them
on the shelf in 2 rows about 3 inches apart, one can position plates
so that the lower part of the rim is supported in 2 places. This
evens the downward pressure on the rim and allows for warp free
bisque firing about a dozen plates stacked together on edge.
I always fired platters flat with 3 short posts in a triangular
pattern, originating from the shelf, and being careful to line the
posts up (with the aid of a cardboard template), stack about 5 - 6
platters, each with a set of posts carrying the weight straight down
to the shelf. I always had trouble with the bottom platter cracking,
so just reused an old cracked one on the bottom each time. Not sure
if the cracking had to with venting off the bottom of the kiln. I
suspect that it was the cause.
Gordon
On Aug 31, 2007, at 7:40 AM, Patty Kaliher wrote:
> She bisque fires them on their edges.
> Leaned against a piece of furniture against the side of the kiln,
> three
> deep. Says they do not warp or crack.
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