Ababi on sun 14 apr 02
From lovely Penland school Glaze book:
Penland fall 1997
Gay Smith/Scott Goldberg
Woo Yellow
Kona f-4 feldspar 33
Barium carb. 25
Dolomite 12
EPK 7
Flint 7
Zircopax 15
Red iron oxide 3
High fire
In cone six dry, interesting
Here is my second test:
.WOO YELLOW3
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1201 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
FELDSPAR SODA F7/SE 36.00
STRONTIUM CARBONATE 15.00
Dolomite 13.00
EPK Kaolin 8.00
SILICA 8.00
ULTROX 15.00
FRIT 3134 5.00
Red Iron Oxide 3.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger Weight%
KNO 0.207 4.88%
CaO 0.297 6.29%
MgO 0.190 2.89%
SrO 0.306 11.99%
Al2O3 0.275 10.58%
B2O3 0.050 1.32%
SiO2 2.227 50.54%
ZrO2 0.247 11.49%
TiO2 0.001 0.03%
K2O 0.003 0.11%
Na2O 0.203 4.76%
Al:Si 8.10
Expan. 7.37
ST 379.13
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Clay Body lighter is better
Colour Cream yellow,the speckles of the claybody are seen through
Glaze Type Yes
Opacity Yes
Texture Silky
Stability yes, I hope
Fit yes
Last changed: last week
Status static
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Comment: I think I will test it with other colors too.
The recipe again:
FELDSPAR SODA F7/SE and STRONTIUM CARBONATE , copper can give nice
turquoise.
Dolomite Is there enough to make purple out of cobalt?
ULTROX 15.00 Perhaps white matte?
I suggest you to try it as it is feldspar for feldspar
If you don't have a software you can try it this way:
.WOO YELLOW3 USA
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1201 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Nepheline Syenite 29.00
STRONTIUM CARBONATE 15.00
Dolomite 13.00
EPK Kaolin 6.50
SILICA 16.00
ULTROX 15.00
FRIT 3134 5.00
Red Iron Oxide 3.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger Weight%
KNO 0.208 5.34%
CaO 0.301 6.29%
MgO 0.181 2.72%
SrO 0.310 11.98%
Al2O3 0.281 10.68%
B2O3 0.051 1.32%
SiO2 2.239 50.18%
ZrO2 0.250 11.48%
TiO2 0.001 0.02%
K2O 0.043 1.52%
Na2O 0.165 3.82%
Al:Si 7.97
Expan. 7.39
ST 379.15
Ababi Sharon
Kibbutz Shoval- Israel
Glaze addict
ababisha@shoval.org.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
Ron Roy on mon 15 apr 02
Just some notes on the following glazes.
The first one is unstable - it's going to release Barium when in contact
with acidic food s for sure.
The 2nd (cone 6) - no Barium but it will probably change colour under use
with acidic foods if the contact is long enough.
The 3rd (cone 6) the silica content is better but not enough to ensure
stability.
You should think twice about using these on surfaces that will be in
contact with food - at least test em to see if they are going to change
colour.
RR
>From lovely Penland school Glaze book:
>Penland fall 1997
>Gay Smith/Scott Goldberg
>
>Woo Yellow
>Kona f-4 feldspar 33
>Barium carb. 25
>Dolomite 12
>EPK 7
>Flint 7
>Zircopax 15
>Red iron oxide 3
>High fire
>In cone six dry, interesting
>Here is my second test:
>
>.WOO YELLOW3
>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>
>Cone 6 1201 deg.C. -
>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>
>FELDSPAR SODA F7/SE 36.00
>STRONTIUM CARBONATE 15.00
>Dolomite 13.00
>EPK Kaolin 8.00
>SILICA 8.00
>ULTROX 15.00
>FRIT 3134 5.00
>Red Iron Oxide 3.00
>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>.WOO YELLOW3 USA
>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>
>Cone 6 1201 deg.C. -
>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>
>Nepheline Syenite 29.00
>STRONTIUM CARBONATE 15.00
>Dolomite 13.00
>EPK Kaolin 6.50
>SILICA 16.00
>ULTROX 15.00
>FRIT 3134 5.00
>Red Iron Oxide 3.00
>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Ron Roy
RR #4
15084 Little Lake Road
Brighton
Ontario
Canada - K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
Ababi on tue 16 apr 02
>You should think twice about using these on surfaces that will be in
>contact with food - at least test em to see if they are going to change
>colour.
>RR
Off course Ron!
The first was the base from Penland. In the next test I changed the
barium into strontium. In the third test, the one I sent here i added 5
frit 3134 , I might add more but I wanted it to be 100 and I liked the
result.
The third one in this letter with your materials (I have Italian soda
feldspar)
I learn carefully and slowly your book ( John's too)
Their is no rush.
Their are too directions in my "glaze addiction"
One:Decorative.
Two: According to your book.
In the first, I try to imitate Shino in ^6 ox. I use Behrens's glazes,
So Lana Wilson's glazes. They will never meet your limits!
The most successful- selling glaze I use, leaches like hell, no wonder,
STONY GREEN-BEHRENS
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6
Seger Weight%
KNO 0.125 5.15%
CaO 0.343 11.09%
MgO 0.074 1.72%
SrO 0.457 27.28%
Al2O3 0.247 14.50%
P2O5 0.041 3.38%
SiO2 1.065 36.86%
TiO2 0.000 0.02%
K2O 0.037 2.00%
Na2O 0.088 3.15%
Al:Si 4.31
Expan. 9.41
ST 399.94
Yet I use it as a paint, high fire paint. This glaze plus copper, in
different amounts and thickness gives me variety of colors, White
greens browns and steel color.
Can it be food surface? It might, but it must be pretty dumb to use
such surface for Soup or salad. (Please see my stoneware page)
I have but hardly use Manganese Dioxide
Barium carbonate
Chrome
Do not dump but do not use iron chromate.
Very carful with my students. The few cups or similar dishes I made,
inside only safe or harmless materials.
Back to your way.
I translate now from German: ( The only sentence I know)
Slow slow but safely.
I do not rush to make your recipes
I start with the expansion tests
I will go on see: WHICH OF MY GLAZES. fit into the right expansion,
which of them will be easier adjusted to your limits, to the rules and
to test leaching.
I have a dream to make a glaze like the stony of Behrens with better
character. I think I am on the way.
Thank you for your comments
Ababi Sharon
Kibbutz Shoval- Israel
Glaze addict
ababisha@shoval.org.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
Here are the two "brothers" soda feldspars I use
Feldspar Soda F-7... 100.00 100.00%
========
100.00
CaO 0.06* 0.60%
MgO 0.01* 0.05%
K2O 0.03* 0.45%
Na2O 0.91* 9.86%
TiO2 0.00 0.03%
Al2O3 0.97 17.32%
SiO2 6.76 71.39%
Fe2O3 0.01 0.30%
LOI 0.66
Untitled Recipe 1
=================
Feldspar Soda F7/SE. 100.00 100.00%
========
100.00
CaO 0.06* 0.56%
MgO 0.01* 0.04%
K2O 0.02* 0.28%
Na2O 0.92* 10.26%
TiO2 0.01 0.08%
Al2O3 0.96 17.60%
SiO2 6.58 71.01%
Fe2O3 0.01 0.16%
Text1 3.60
Si:Al 6.85
SiB:Al 6.85
Expan 7.77
LOI 0.36
>From Maffie's web site ( and Insight)
Ababi
"
---------- Original Message ----------
>Just some notes on the following glazes.
>The first one is unstable - it's going to release Barium when in
contact
>with acidic food s for sure.
>The 2nd (cone 6) - no Barium but it will probably change colour under
>use
>with acidic foods if the contact is long enough.
>The 3rd (cone 6) the silica content is better but not enough to ensure
>stability.
>You should think twice about using these on surfaces that will be in
>contact with food - at least test em to see if they are going to change
>colour.
>RR
>>From lovely Penland school Glaze book:
>>Penland fall 1997
>>Gay Smith/Scott Goldberg
>>
>>Woo Yellow
>>Kona f-4 feldspar 33
>>Barium carb. 25
>>Dolomite 12
>>EPK 7
>>Flint 7
>>Zircopax 15
>>Red iron oxide 3
>>High fire
>>In cone six dry, interesting
>>Here is my second test:
>>
>>.WOO YELLOW3
>>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>>
>>Cone 6 1201 deg.C. -
>>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>>
>>FELDSPAR SODA F7/SE 36.00
>>STRONTIUM CARBONATE 15.00
>>Dolomite 13.00
>>EPK Kaolin 8.00
>>SILICA 8.00
>>ULTROX 15.00
>>FRIT 3134 5.00
>>Red Iron Oxide 3.00
>>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>>.WOO YELLOW3 USA
>>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>>
>>Cone 6 1201 deg.C. -
>>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>>
>>Nepheline Syenite 29.00
>>STRONTIUM CARBONATE 15.00
>>Dolomite 13.00
>>EPK Kaolin 6.50
>>SILICA 16.00
>>ULTROX 15.00
>>FRIT 3134 5.00
>>Red Iron Oxide 3.00
>>,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
>Ron Roy
>RR #4
>15084 Little Lake Road
>Brighton
>Ontario
>Canada - K0K 1H0
>Phone: 613-475-9544
>Fax: 613-475-3513
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