Ken Nordling on tue 11 feb 97
Does someone have the recipe for Sharon's
fake golden ash glaze, C/6 oxidation? I understand
it was posted 4/l0/96 before I came on Clayart.
Would appreciate hearing from anyone who
has it.
Thanks - Jo (khnord@sedona.net)
Wendy Hampton on wed 12 feb 97
Hi,
Here is the Cone 6 Sharons fake golden ash that was sent to me
Ceday Heights Redart 28.0
Dolomite 24.54
Strontium Carbonate 9.43
Ball Clay 21.04
Lithium Carbonate 1.79
Gerstley Borate 9.94
Bone ash 5.26
Bentonite 1%
Epson Salts 1%
Please let me know your results Again, I fired this at ^6 oxidation with ^6
junior in the sitter and with Envirovent all the time. Emily in Astoria OR
Evan Dresel on thu 13 feb 97
At 08:21 AM 2-11-97 EST, you wrote:
>----------------------------Original message----------------------------
> Does someone have the recipe for Sharon's
> fake golden ash glaze, C/6 oxidation? I understand
> it was posted 4/l0/96 before I came on Clayart.
> Would appreciate hearing from anyone who
> has it.
> Thanks - Jo (khnord@sedona.net)
>
Here is the recipe for the Montgomery College Golden Fake Ash that
may be the same as the Sharon's glaze. I posted this nearly a year
ago but this version substitutes strontium carbonate for barium
sulfate and has been recalculated to 100 after the substitution. I
have tested it in oxidation but have not mixed up a batch yet. My
test was actually ^7 with no soak (my that kiln fires fast) as
opposed to the ^6 with soak I was aiming for. Oh well.
Anyway,
glaze name: Golden Fake Ash
cone: 6
color: yellow/tan ox; orange/tan red.
surface: runny ash
firing: ox. or red.
recipe:
Gerstley borate 10.1
Bone ash 5.3
Dolomite 25.0
Lithium carbonate 1.8
Strontium carbonate 8.1
Red art clay 28.4
Ball clay 21.3
add:
Bentonite 1
Epsom salts to H2O 1
comments:
Better in oxidation. Golden in oxidation, orange in reduction.
Interesting if thin in reduction.
From Montgomery College, Rockville MD.
pedresel@revolution.3-cities.com
Did I format that right, Richard?
I have also rounded everything to one decimal place. This
is a personal gripe of mine: Who weighs out a glaze to more
accuracy than that? But we are forever seeing glazes with four
significant figures. My original version of this had numbers
like 1.71 and 27.15. I guess if someone consistently used, say
three significant figures then it would make some sense for large
batches, but it could get awkward trying to have things add up to
100. I think we are kidding ourselves if we think we are
about to achieve better accuracy, much less tell the difference
in the final product. So my vote is for one decimal place unless
you have a darn good reason to use more.
(Oh for those of you who missed this in school: significant
figures are basically numbers that mean something. 120, 12, 1.2,
..12 all have two significant figures. 1.71 has three significant
figures, 27.15 has four. You get the general idea.)
Have fun.
-- Evan Dresel in W. Richland WA. It's snowing again.
Richard Burkett on fri 14 feb 97
Evan Dresel says:
>Did I format that right, Richard?
Perfectly, Evan, and thank you!
>I have also rounded everything to one decimal place. This
>is a personal gripe of mine: Who weighs out a glaze to more
>accuracy than that? But we are forever seeing glazes with four
>significant figures.
Yes, good point, and one that is most probably a result of the computer
age where the extra digits may make a small difference if glazes are
changed to larger batches, and back again. For example I programmed
HyperGlaze to change the number of decimal places it adds to recipe
amounts depending on the batch size. The percentage recipe calculated is
given with two decimal places, as some of the materials (like colorants)
often appear in recipes in quite small percentages.
Three significant digits for recipe amounts is probably enough. Two is a
bit miminal at times. I personally just ignore the last one or two extra
digits as needed and don't let them bother me!
Thanks again for the perfect job of recipe formatting.
Richard
Richard Burkett - School of Art, SDSU, San Diego, CA 92182-4805
E-mail: richard.burkett@sdsu.edu <-> Voice mail: (619) 594-6201
Home Page: http://rohan.sdsu.edu/dept/rburkett/www/burkett.html
CeramicsWeb: http://apple.sdsu.edu/ceramicsweb/index.html
Emily P. Henderson on sun 16 feb 97
At 08:21 AM 2/11/97 EST, you wrote:
>----------------------------Original message----------------------------
> Does someone have the recipe for Sharon's
> fake golden ash glaze, C/6 oxidation? I understand
> it was posted 4/l0/96 before I came on Clayart.
> Would appreciate hearing from anyone who
> has it.
> Thanks - Jo (khnord@sedona.net)
>
>Hi There, I think this is what you wanted:
Red Art Clay (Cedar Heights) 27.15
Dolomite 23.80
Barium Sulfate/Carbonate 12.20
Ball Clay (Tennessee #5) 20.40
Lithium Carbonate 1.71
Gerstley Borate 9.64
Bone Ash 5.10
I got it from PEDresel@aol.com
I tested it at ^6 in the sitter.... It was a NICE glaze, a nice golden ash
with greenish to bronzish rivulets. I tested over a beige stoneware. I
also substitued strontium carbonate for the barium at .75% strontium to 100%
barium and recalculated the whole glaze accordingly.
Here is another one that came from Suzanne Fuqua (Suzanne511@aol.com)
posted Nov. 6 to Clayart ^6 oxidation:
Ferro Frit 3195 46
Whiting 34
EPK 20
She noted she added 3% copper carbonate but thought other colorants would
be worth a try. I haven't tried this formula.
Good luck,
Emily in Astoria OR where the fog is so dense that I can't find the end of
my finger with out checking for it with the other hand :-)
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