Sharon31 on sun 2 jul 00
Hi!
This glaze, I tested lately, ^6 ox.
STONY MATT GLAZE^6 - BEHRENS
============================
BONE ASH............ 6.00 5.83%
NEPHELINE SYENITE... 26.10 25.34%
MAGNESIUM CARBONATE. 2.40 2.33%
WOLLASTONITE........ 13.20 12.82%
STRONTIUM CARBONATE. 31.60 30.68%
ENGLISH KAOLIN(Puraf 15.10 14.66%
TIN................. 5.60 5.44%
I added COPPER OXIDE........ 3.00 2.91% and got beautifull Stony
Matte turquoise.
========
103.00
CaO 0.36* 11.89%
MgO 0.05* 1.26%
K2O 0.04* 2.09%
Na2O 0.09* 3.40%
SrO 0.45* 27.12%
TiO2 0.00 0.02%
Al2O3 0.24 14.12%
P2O5 0.04 3.36%
SiO2 1.05 36.58%
Fe2O3 0.00 0.17%
Si:Al 4.40
SiB:Al 4.40
Expan 9.52
In the next testing I tryed to see what happens if I add several materials,
as I was running out of strontium carbonate, I continued with barium
carbonate 1.33% of the strontium carbonate.
There was not a significant different between the result of the two tests.
I added 3, and 4 copper oxide(insteade of 3) trying to have gray spots, the
4, made it but not special.
to the 3 copper oxide recipe I added:(103 grams batch)
1) 1gram Manganese dioxide 24 mesh: trash!
2)1 gram Manganese dioxide 60 mesh, interesting.
3)1 gram Ilmenite granular, interesting
4)the same with rutile granular, can see it only with glasses.
5) - 8) 2 gram, 3grams, 4 and 5 grams SiC 100 mesh. To be repeated with
finner SiC and thicker glaze.
********************************
I tried another glaze,very dry, based on a glaze from my shcool.
The good or almost good result was with a line blend , of that glaze and the
glaze I brought in the begining of this letter.
This glaze is only for decorative use, it does not fit good. If you put it
above brown or red clay, it looks like a copper stone,from the mine, not the
most beautifull stone,more like a real rock. I hope you like it. You can
try it in ^7 for smoother results.
STONY MATT GREEN2
=================
BONE ASH............ 3.0 2.88%
NEPHELINE SYENITE... 47.3 44.92%
MAGNESIUM CARBONATE. 1.2 1.15%
WOLLASTONITE........ 6.7 6.33%
STRONTIUM CARBONATE. 23.5 22.35%
ENGLISH KAOLIN(Puraf 17.7 16.84%
TIN................. 2.8 2.69%
COPPER OXIDE........ 3.0 2.85%
========
105.3
CaO 0.24* 5.61%
MgO 0.04* 0.59%
K2O 0.08* 3.13%
Na2O 0.22* 5.62%
SrO 0.43* 18.43%
TiO2 0.00 0.02%
Al2O3 0.46 19.51%
P2O5 0.03 1.55%
SiO2 1.81 45.33%
Fe2O3 0.00 0.20%
Si:Al 3.94
SiB:Al 3.94
Expan 9.30
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