Ababi on wed 13 feb 02
Hello Dan.
I have not done much with raku but I shall pass here what I know.
The first glaze is crater raku, an American glaze
( You can download the list from the ceramic web)
Glaze name: Craters
Cone: 06-04
Surface texture: matt
Firing: raku
Date: 12/17/98
Recipe: Percent Batch
Magnesium carb 9.4 20.00
Kaolin 9.4 20.00
Lithium carbonate 28.3 60.00
Borax 14.2 30.00
Copper carbonate 5.7 12.00
Flint 28.3 60.00
Bentonite 4.7 10.00
Totals: 100.0 % 212.00 g
It is kind of crater. Very low expansion.
Now to the ones I tested:
One recipe is lost I believe you can try yourself try 40-60 frit,
3134 will be good add 30 magnesium carbonate and 10 clay ball clay or
kaolin. you must apply thick, some layers until cracks CMC is good to
avoid peeling of before firing.
Now to definite success Based on a Barium glaze of Behrens to ^06
As I deleted it I shall make it with your materials.
It is easier to convert it to my regular frit as it does not have CaO.
You will find the way to do it
BARIUM GLAZE 06 BEHRENS
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1222 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
STRONTIUM CARBONATE 18.70
Pemco P-25 26.89
Magnesium Carb Light 13.60
Boric Acid 6.70
EPK Kaolin 6.70
Flint 27.42
copper oxide 3.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger Weight%
KNO 0.214 6.52%
CaO 0.007 0.16%
MgO 0.433 7.80%
ZnO 0.006 0.23%
SrO 0.340 15.74%
Al2O3 0.153 6.96%
B2O3 0.320 9.96%
SiO2 1.959 52.59%
TiO2 0.001 0.03%
K2O 0.042 1.75%
Na2O 0.172 4.77%
Al:Si 12.81
Expan. 7.49
ST 347.94
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
The way.
Apply medium, or thick, test first.
fire to ^06 in oxidation than add it to a regular raku. Actually
enough to fire it up to orange red hit. Than to the reduction pail
Good glazing
Ababi
---------- Original Message ----------
>to: ababi
>i'm interested in your comment about crater glazes,
>are you talking about raku glazes; have been searching
>for some crater type raku glazes --- if they are, can
>you share formula's ... many thanks .... dan
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