Alisa Clausen on mon 21 feb 05
Glaze test for Yellow Oxide Glaze, cone 6 ox.
Glaze tested on white midrange stoneware fired in electric oxidation to =
1240c. (2264f)
Source: Ceramics Monthly April, 2001
Credited to:
Firing ramp:
100c p/h to 600c (212f - 1112f)
150c p/h to 1140c (302f - 2084f)=20
80c p/h to 1240c (176f - 2264f)
10 min. soak
cool down max. to 1100c (2012f)
Hold 1 hour
Shut off kiln
Recipe:
4.35 Lithium Carb.
18.48 Zinc ox
28.26 3110
31.52 Kaolin
17.39
ADD
4.35 Tin Oxide
0,44 Cu. Carb.
4,35 RIO
0,54 Ochre
Note: All raw materials are measured up or down to the nearest half =
decimal. =20
Colorants or additives to a 100 gram test batch are measured in percent =
to the 100 gram test batch.
Results:
Gloss glaze that is rust red where thinnest. It pooled very glassy with =
a crystallized yellowish surface. There is a red spot in the middle of
the test tile. I have tested this glaze twice, both on white and on =
brown stoneware. Both times, the glaze showed a well melted, multi =
colored gloss. The glaze was an more overall yellowish brown on the =
brown stoneware. Smooth and slightly more of a semi gloss.
WARNING: I glazed the insides of several pots with this glaze. The =
glaze literally popped off the slides of the pot in big chunks and =
splinters. This is the first time I have witnessed a glaze shiver so =
severely minutes after the pots were unloaded. They continued to shiver =
in small splinters a day after. Now I have thrown them away, carefully, =
but they could still be pinging and popping.
The test tiles are from very recently and from over a year ago. They =
have not shivered.
Regards from Alisa in Denmark
Crystal Nolfo~Brown on thu 24 feb 05
Alisa,
There seems to be the name of one ingredient missing. It's the last
percentage listed. This glaze sounds interesting. Do you happen to have
pictures on a website that goes with these tests that you are doing? I fire
^6 oxidation.
Crystal Nolfo~Brown
USA
On Mon, 21 Feb 2005 12:21:37 +0100, Alisa Clausen
wrote:
>Glaze test for Yellow Oxide Glaze, cone 6 ox.
>
>Glaze tested on white midrange stoneware fired in electric oxidation to
1240c. (2264f)
>
>Source: Ceramics Monthly April, 2001
>Credited to:
>
>Firing ramp:
>100c p/h to 600c (212f - 1112f)
>150c p/h to 1140c (302f - 2084f)
>80c p/h to 1240c (176f - 2264f)
>10 min. soak
>cool down max. to 1100c (2012f)
>Hold 1 hour
>Shut off kiln
>
>Recipe:
>
>4.35 Lithium Carb.
>18.48 Zinc ox
>28.26 3110
>31.52 Kaolin
>17.39
>
>ADD
>4.35 Tin Oxide
>0,44 Cu. Carb.
>4,35 RIO
>0,54 Ochre
>
>Note: All raw materials are measured up or down to the nearest half
decimal.
>Colorants or additives to a 100 gram test batch are measured in percent to
the 100 gram test batch.
>
>Results:
>Gloss glaze that is rust red where thinnest. It pooled very glassy with a
crystallized yellowish surface. There is a red spot in the middle of
>the test tile. I have tested this glaze twice, both on white and on
brown stoneware. Both times, the glaze showed a well melted, multi colored
gloss. The glaze was an more overall yellowish brown on the brown
stoneware. Smooth and slightly more of a semi gloss.
>
>WARNING: I glazed the insides of several pots with this glaze. The glaze
literally popped off the slides of the pot in big chunks and splinters.
This is the first time I have witnessed a glaze shiver so severely minutes
after the pots were unloaded. They continued to shiver in small splinters
a day after. Now I have thrown them away, carefully, but they could still
be pinging and popping.
>
>The test tiles are from very recently and from over a year ago. They have
not shivered.
>
>Regards from Alisa in Denmark
>
Alisa Liskin Clausen on sat 26 feb 05
On Thu, 24 Feb 2005 08:01:31 -0500, Crystal Nolfo~Brown
wrote:
>Alisa,
>
>There seems to be the name of one ingredient missing. It's the last
>percentage listed. This glaze sounds interesting. Do you happen to have
>pictures on a website that goes with these tests that you are doing? I fire=
>^6 oxidation.
O=CDY, sloppy me.
Silica
all photos of tests are at http://photos.yahoo.com/alisapots
until I get my website built up again.
regards from Alisa
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