Claire Hasselbeck on fri 30 jul 99
Allison's recipe calls for Bells dark ball clay. I've been unable to
locate that. Are there comparable substitutes or where can I get Bells?
Ray Carlton on mon 2 aug 99
any reasonably refined terracotta clay will do the trick...the idea of
using iron rich clay in celadon recipes is to help disperse the iron
through the glaze mixture when in a raw state....using raw iron means that
the glaze has to be very carefully blended and sieved to ensure good
dispersal...what is the recipe by the way???
good luck
At 17:47 30/07/99 EDT, you wrote:
>----------------------------Original message----------------------------
>Allison's recipe calls for Bells dark ball clay. I've been unable to
>locate that. Are there comparable substitutes or where can I get Bells?
>
cheers Ray Carlton
McMahons Creek Victoria Australia
Alison Hamilton on thu 5 aug 99
Hello Ray,
Here is the original posting I sent to clayart on this recipe. It was in
response to Sandra Dwiggins looking for a translucent, deep green, cone 6 ox
recipe.
I'd love to hear your results if you decide to experiment with this glaze.
If you don't have F12, you can substitute Frit 3134 for it.
---------------------------
It is with great trepidation that I am posting this glaze recipe. The last
time I posted a recipe - well, let's just say it did not survive the scrutiny
of The-One-Who-Knows (a.k.a. Ron Roy).
Posting the recipe changed my priorities which resulted in a huge detour in my
pottery work; Ron's comments convinced me (kicking and screaming) that I
needed to know more about glaze calculation. It has not been a smooth path,
but (drum roll, please) here's a recipe that should pass muster, especially
since half of it is his! (and if it doesn't work, blame my half of the
recipe!) :)
Ron kindly gave me a revision to a green glaze of mine that was crazing and I
also made a revision. This recipe is a blend of these two revisions. I
tested it for the first time at Ron's course at Canadore College a few weeks
ago and another student commented that it looked pretty close to a reduction
celadon. Let me know what you think.
This is for Cone 6, oxidation.
Ron-Ali's Green
===============
DOLOMITE............ 9.50 9.31%
G-200 FELDSPAR G200. 38.50 37.75%
SILICA.............. 17.00 16.67%
F12................. 14.00 13.73%
ZINC OXIDE.......... 2.00 1.96%
BELL DARK BALL CLAY. 7.00 6.86%
TALC................ 7.00 6.86%
Tin Oxide........... 2.00 1.96%
Manganese Dioxide... 2.00 1.96%
*Copper carbonate.... 2.00 1.96%
BENTONITE........... 1.00 0.98%
========
102.00
CaO 0.36* 7.12%
MnO2 0.07 2.13%
MgO 0.31* 4.36%
K2O 0.13* 4.40%
Na2O 0.13* 2.84%
ZnO 0.07* 2.13%
Fe2O3 0.00 0.21%
TIO2 0.00 0.11%
B2O3 0.14* 3.53%
AL2O3 0.28 10.00%
SiO2 2.88 61.04%
SnO2 .04 2.12%
COST/KG 1.90
Si:Al 10.38
EXPAN 484.95
Alison Hamilton
Trout Lake
Dorset, Ontario
Jim Brooks on tue 17 aug 99
can/will someone tell me what "F12".? Yhis reciept calls for F12..
. thanks.. Jim in Dallas...where it is soooo hot that we have been bisque
firing on the sidewalks... trying not to go over Cone 06...........
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