Ababi on sun 14 apr 02
The only one high fire glaze, from the school I went to, still
interesting me is as, I have sent many times, I belive it is a high
fire glaze. The base was
Potash feldspar 30
Soda feldspar 30
Whiting 20 and
Kaolin 20
What cone?
My teacher loved ^7 12240 c
This glaze as had a lot of CaO, when was thin the 3 rutile and 1 cobalt
oxide gave nice blue and green variations when was sprayed gave white
dots on light blue surface.
I tried it with other colorants, I did not like the result. Yet I tried
the combination of 3 rutile and one cobalt oxide with other matte bases
and got nice colors, mainly greens.
In the last two tests, finally, I got good results for ^6 glaze.
Here the recipe with your materials.
I have very good experience with software, I believe it will work out
anyway you must test first.
BLU.WHITE.DOT FOR CONE 6 USA
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1201 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Calcium Carbonate 22.90
EPK Kaolin 14.00
Nepheline Syenite 44.10
SILICA 14.30
FRIT 3110 4.70
Rutile 3.00
Cobalt Oxide 1.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger Weight%
KNO 0.305 7.97%
CaO 0.691 14.67%
MgO 0.003 0.05%
Al2O3 0.452 17.42%
B2O3 0.005 0.14%
SiO2 2.480 56.38%
TiO2 0.112 3.37%
K2O 0.067 2.37%
Na2O 0.239 5.60%
Al:Si 5.49
Expan. 8.88
ST 373.76
Comment: You can see it in my second glaze page
Here the second recipe:
BLUE WITH WHITE SPECKLES USA
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1201 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
FLUORSPAR 18.10
EPK Kaolin 19.40
Nepheline Syenite 33.60
SILICA 22.90
Cryolite 6.00
Rutile 3.00
Cobalt Oxide 1.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger Weight%
KNO 0.316 8.11%
CaO 0.682 14.75%
MgO 0.002 0.04%
Al2O3 0.453 17.79%
SiO2 2.419 56.04%
TiO2 0.106 3.28%
K2O 0.046 1.66%
Na2O 0.270 6.45%
Al:Si 5.34
Expan. 9.02
ST 373.70
Comment: You can see it in my second glaze page The fluor in both
fluorspar and cryolite changed the appearance of the glaze.
Both glazes appeared nicer on cream colored claybody less on buff and
worst on dark brown
Ababi Sharon
Kibbutz Shoval- Israel
Glaze addict
ababisha@shoval.org.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
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