Smith, Judy on tue 30 jan 07
I was looking at a pottery article in the HGTV web site. The guests on
the Carol Duvall show had made these beautiful pots with two glazes that
flowed together. The article said that "The last step of the glazing
process is to apply a paste of wood ash on the pot. This helps the
glazes melt and run into each other.". Does anyone have any ideas about
what may be in this wood ash paste besides wood ash? I found a web site
for the potters (Flynn Sochon and Halona Gustin) and I sent them an
e-mail. The e-mail bounced back as undeliverable. =20
=20
Thanks,
Judy Smith=20
Timothy Joko-Veltman on tue 30 jan 07
On 1/30/07, Smith, Judy wrote:
> glazes melt and run into each other.". Does anyone have any ideas about
> what may be in this wood ash paste besides wood ash?
Judy,
I've never tried this, but my first guess would be that it is indeed
just wood ash, as it does make a paste, if you mix in only a little
bit of water. It is full of fluxes, and applying some on top of a
glaze would definitely make it run, especially un-washed ash (in which
case, be sure to use gloves when handling).
They might have added a bit of kaolin or ball clay to help it suspend
better or to keep it from running completely off the pot, but I would
guess not.
Just my guess, and my 2 cents.
Regards,
Tim
Richard Aerni on tue 30 jan 07
I am guessing that what they were doing was what I sometimes do, which is to
simply make a paste from the sieved wood ashes and water and brush it over
the previously applied glaze. Depending on your wood ash, how much paste
you use, the flux levels in the underlying glaze, and your firing
temperature, all kinds of things could happen, some good, some not so good.
Make sure to put your piece on a soft brick pad if you aren't going to test
the process first.
Best,
Richard Aerni
Rochester, NY
Hank Murrow on tue 30 jan 07
On Jan 30, 2007, at 7:48 AM, Smith, Judy wrote:
> I was looking at a pottery article in the HGTV web site. The guests on
> the Carol Duvall show had made these beautiful pots with two glazes
> that
> flowed together. The article said that "The last step of the glazing
> process is to apply a paste of wood ash on the pot. This helps the
> glazes melt and run into each other.". Does anyone have any ideas
> about
> what may be in this wood ash paste besides wood ash? I found a web
> site
> for the potters (Flynn Sochon and Halona Gustin) and I sent them an
> e-mail. The e-mail bounced back as undeliverable.
Dear Judy;
I was looking at pieces in the basement storage area of the
Smithsonian's Freer Gallery some years ago, when I noticed a tea
jar(chaire) that was glazed with a tenmoku glaze but had strong yellow
patches that seemed to have run down the side of the pot. I thought and
thought, wondering what they used, from what was available to them 500
years ago. I realized that it must have been wood ashes brushed on in
patches. I returned home from that trip and glazed a few pieces with
Tenmoku and made a slurry of water and wood ashes from my stove. I
dipped my fingertip in the slurry and applied several dots to the
pieces. After the fire, the dots turned the tenmoku to yellow, and they
ran down somewhat, resembling the spyhole of my kiln. I'll send a pic
if desired.
Cheers, Hank
www.murrow.biz/hank
Mike on wed 31 jan 07
I do something like this in some of my glaze application where there is
little angle to create a long run. I mix extra wood ash into my ame yu
(like tenmoku but lighter in color), 3 ash to 3 glaze, then I apply this
to the places where my glazes meet and that I want to get longer runs.
Fluxes it nicely.
Be careful though, even though ash is a flux, by itself it takes a high
temp to melt. If you're firing to lower temps and the ash isn't touching
something else, or is too thickly applied, it may not even melt.
Mike
in Taku, Japan
karatsupots.blogspot.com
potteryofjapan.com
Smith, Judy wrote:
> I was looking at a pottery article in the HGTV web site. The guests on
> the Carol Duvall show had made these beautiful pots with two glazes that
> flowed together. The article said that "The last step of the glazing
> process is to apply a paste of wood ash on the pot. This helps the
> glazes melt and run into each other.". Does anyone have any ideas about
> what may be in this wood ash paste besides wood ash? I found a web site
> for the potters (Flynn Sochon and Halona Gustin) and I sent them an
> e-mail. The e-mail bounced back as undeliverable.
>
>
>
> Thanks,
>
> Judy Smith
>
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Josh Berkus on sun 4 feb 07
> Be careful though, even though ash is a flux, =A0by itself it takes a high
> temp to melt. If you're firing to lower temps and the ash isn't touching
> something else, or is too thickly applied, it may not even melt.
I'll second this. I found out that even at Cone 10, if you apply a paste t=
o=20
more than about 1/8" thick, some of the ash will not flux but will just bak=
e=20
on like a crust.
=2D-=20
The Fuzzy Chef
San Francisco
John Dellow on mon 5 feb 07
Josh Berkus wrote:
>>Be careful though, even though ash is a flux, by itself it takes a high
>>temp to melt. If you're firing to lower temps and the ash isn't touching
>>something else, or is too thickly applied, it may not even melt.
>
>
> I'll second this. I found out that even at Cone 10, if you apply a paste to
> more than about 1/8" thick, some of the ash will not flux but will just bake
> on like a crust.
>
I over come the crustyness by adding a small amount of sodium silicate
to the past,adds extra flux. Also the up side is that the sodium
silicate acts as a binder when dry, stops the ash dusting off the pot
befor placeing in kiln.
--
John Dellow "the flower pot man"
From the land down under
Home Page http://www.welcome.to/jkdellow
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