Lorene on wed 28 jun 06
Ooops. I accidentally used Custer Feldspar instead of Kona Feldspar in a
batch of glaze I made tonight. It's a ^6 oxidation nutmeg glaze. I looked
in the archives and see that the Custer is a potash and the Kona is soda but
what does that mean for my glaze? How will it be affected? Can I fix it?
Thanks for any advice.
--
Lorene -
in the Minnesota northwoods on the
beautiful Rainy River border with Canada
William & Susan Schran User on wed 28 jun 06
On 6/28/06 2:59 AM, "Lorene" wrote:
> I accidentally used Custer Feldspar instead of Kona Feldspar in a
> batch of glaze I made tonight. It's a ^6 oxidation nutmeg glaze. I looked
> in the archives and see that the Custer is a potash and the Kona is soda but
> what does that mean for my glaze? How will it be affected? Can I fix it?
The soda feldspar generally melts at a lower temperature than the potash
spar. What it means for your specific glaze is unknown until you do a test
firing, unless you look at the changed flux/alumina/silica ratio to see if
the formula is now out of the range for the firing temperature. Repost back
after the firing to let us know how the results.
-- William "Bill" Schran
Fredericksburg, Virginia
wschran@cox.net
wschran@nvcc.edu
Brad Sondahl on wed 28 jun 06
Back in college I mostly ran the ceramics studio, as there was no
professor, and mixed all the glazes. One time I put in Soda Feldspar
when it called for Potash Spar. It was a high fire glaze and it didn't
affect the melt, but the glaze was supposed to be clear, and instead
came out with a purplish haze. I didn't like the results, nor did
another student who was glazing a dinnerset for a senior project. But
then she adjusted her thinking, which was easier than making a new
dinnerset, called it "Purple Haze," and she graduated summa cum laude
while I just ended up a professional potter.
Brad Sondahl
--
For my comics, pottery how-to videos, original art, music, pottery, and literature, visit my homepage
http://sondahl.com
Ron Roy on wed 28 jun 06
HI Lorene,
Send me the recipe and I'll take a look to see if you need to do anything.
ronroy@ca.inter.net
RR
>Ooops. I accidentally used Custer Feldspar instead of Kona Feldspar in a
>batch of glaze I made tonight. It's a ^6 oxidation nutmeg glaze. I looked
>in the archives and see that the Custer is a potash and the Kona is soda but
>what does that mean for my glaze? How will it be affected? Can I fix it?
>
>Thanks for any advice.
>
>--
>Lorene -
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Lynn Goodman Porcelain Pottery on wed 28 jun 06
On Jun 28, 2006, at 2:59 AM, Lorene wrote:
> Ooops. I accidentally used Custer Feldspar instead of Kona Feldspar
> in a
> batch of glaze I made tonight. It's a ^6 oxidation nutmeg glaze. I
> looked
> in the archives and see that the Custer is a potash and the Kona is
> soda but
> what does that mean for my glaze? How will it be affected? Can I fix
> it?
I don't think there's any fixing this. HOWEVER... mix it up and test
it. You might love it, and it sure beats throwing it away. I have tried
a number of "mistakes" and put them into my permanent collection of
recipes.
Lynn
Lynn Goodman
Fine Porcelain Pottery
548 Court St.
Brooklyn, NY 11231
718-858-6920
Cell 347-526-9805
www.lynngoodmanporcelain.com
Lorene on thu 29 jun 06
I've now done a small test as recommended and it "looks" just fine. No
crazing or anything, color looks great. Ron Roy generously offered to look
at the recipe and I have sent it to him. I'm sure he'll note anything about
stability and those important aspects.
I'll keep you posted. Thanks to all.
Lorene
On 6/28/06, Lorene wrote:
>
> ...I accidentally used Custer Feldspar instead of Kona Feldspar in a batch
> of glaze I made tonight....
>
> --
> Lorene -
> in the Minnesota northwoods on the
> beautiful Rainy River border with Canada
>
--
Lorene -
in the Minnesota northwoods on the
beautiful Rainy River border with Canada
Lorene on thu 29 jun 06
I love it! Was this back in the 60s? Good times :-)
Lorene
On 6/29/06, Brad Sondahl wrote:
>
> ... which was easier than making a new
> dinnerset, called it "Purple Haze," and she graduated summa cum laude
> while I just ended up a professional potter.
> Brad Sondahl
>
> --
> For my comics, pottery how-to videos, original art, music, pottery, and
> literature, visit my homepage
> http://sondahl.com
>
>
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--
Lorene -
in the Minnesota northwoods on the
beautiful Rainy River border with Canada
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