Craig Martell on tue 30 apr 02
Hi:
The closest thing we have to Kingman is G-200. Kingman had about 12%
Potassium and G-200 has about 10.7%. That's the big deal, without going
into the other oxides and the alumina/silica content.
When Moose Creek Feldspar becomes available, it will be the potash spar of
choice. Moose Creek has about 13% Potassium. This is a very good potash
spar.
regards, Craig Martell in Oregon
Hank Murrow on tue 30 apr 02
>on 4/30/02 8:43 AM, Sheldon Bieber at shelybie@OPTONLINE.NET wrote:
>
>> Does anyone know a reliable substitute for either kingman or buckingham
>> feldspar? Is it possible to purchase them anywhere?
>
>Not unless you can luck into finding someone who has a stash. Buckingham
>has been gone for 25 years, and Kingman for at least 20. When Kingman
died,
>I switched to Custer, and noticed no difference in my glazes. They're
about
>as similar as two feldspars can be. Custer has the most silica of the
>three, Buckingham the least, so you might have to take out a bit of the
>silica in your recipe to get an identical look, but the adjustment would be
>pretty minor. And calculation software would be your best bet if you want
>to get an exact duplicate.
>Paul Lewing, Seattle
Good Morning Feldspar Fans;
I have done fusion buttons of all the spars available to me +
the supplies of NOS Spars I had on Hand.
Buckingham deserves the fine reputaion it had in the
beginning of the studio pottery movement. The fusion button shows a
nicely melted and rounded button with no crazing.
Kingman shows a less melted and rounded button with some crazing.
Custer is still less melted and less rounded, with more
crazing and some bubbles.
All fusion buttons were fired in more than one firing, and
all in the same location in the kiln (C/10). Glad I have 200+ #s of
the Buckingham.
My all time favorite was K-200 feldspar, which contained 14%
Potassium!
Best, Hank
Matt MacIntire on wed 1 may 02
Craig wrote:
>> When Moose Creek Feldspar becomes available, it will be the=20
>> potash spar of choice. Moose Creek has about 13% Potassium.=20
Having seen rumors on Clayart about this new Feldspar for some time now
on Clayart, I want to ask...
What is the story about Moose Creek Feldspar? Will Moose Creek be
available soon? If so where? Is there any way to get small quantities
at the present time?
Thanks in advance for any update.
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