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wobbly porcelain - refiring/soda firing warping on wadding

updated thu 2 oct 08

 

L TURNER on mon 29 sep 08


Katie Ellis wrote:

> My feet always droop between the balls of
> wadding.
>
My suggestion to reduce the droop is to place the wadding balls closer
together. Try halving the space between them until you reach a spacing that
does not droop. If you have large platter type pieces, place some wadding
balls inside the foot ring. If you are up to it and are soda or wood
firing, you can shape the wadding to create decorative spots on the piece.

Lou Turner,
The Woodlands, TX

Paul Herman on mon 29 sep 08


Katie,

Please try using more wads. If your foot ring warps while using 3 or 4
wads, try 6 or 8. More points of support might help to even things out.

Best wishes,

Paul Herman

Great Basin Pottery
Doyle, California US
www.greatbasinpottery.com/




On Sep 29, 2008, at 9:59 AM, Katie Ellis wrote:

> I'm pretty sure the answer to my question is 'no', but while we're
> on the
> topic, are there any tips/secrets to avoiding the distortion of
> footrings
> when soda firing porcelain? My feet always droop between the balls of
> wadding.
>
> -katie

gayle bair on mon 29 sep 08


Hi Hank,
I did consider that but figured to wait for an answer.
So what if the flattened ring was sectioned like () with just enough
space for vapor to enter but not enough for the foot to slump.
Gayle Bair
Bainbridge Island WA
Tucson AZ
gayle@claybair.com
www.claybair.com





On Sep 29, 2008, at 3:36 PM, Hank Murrow wrote:

> On Sep 29, 2008, at 11:37 AM, gayle bair wrote:
>
>> Hi Katie,
>>
>> I've not soda fired but is there any reason one cannot make and use a
>> flattened ring of wadding?
>>
>
> Dear Gayle;
>
> I think most folks wadding their soda work want the vapor to reach
> the bottom. Thus the spaces between.
>
> Cheers, Hank

Vince Pitelka on mon 29 sep 08


Katie Ellis wrote:
"I'm pretty sure the answer to my question is 'no', but while we're on the
topic, are there any tips/secrets to avoiding the distortion of footrings
when soda firing porcelain? My feet always droop between the balls of
wadding."

Hi Katie -
Yes, use more wads. Only the smallest forms can be supported with three
wads. Of course, that means that you cannot wad the pots in advance. Any
time there are more than three wads on the bottom of a piece you need to wad
the pots as you are putting them in the kiln, so that the wadding is soft
and will settle slightly to conform to any irregularities in the kiln shelf
and will support the pot evenly. Roll your wads carefully so that they are
all the same size on a piece. With a smaller piece, use smaller wads, and
larger ones on a larger piece. The aesthetics of wadding marks is very
important.

Let me know if this helps -
- Vince

Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net; wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka

Katie Ellis on mon 29 sep 08


I'm pretty sure the answer to my question is 'no', but while we're on the
topic, are there any tips/secrets to avoiding the distortion of footrings
when soda firing porcelain? My feet always droop between the balls of
wadding.

-katie

gayle bair on mon 29 sep 08


Hi Katie,

I've not soda fired but is there any reason one cannot make and use a
flattened ring of wadding?

Gayle Bair
Bainbridge Island WA
Tucson AZ
gayle@claybair.com
www.claybair.com





On Sep 29, 2008, at 9:59 AM, Katie Ellis wrote:

> I'm pretty sure the answer to my question is 'no', but while we're
> on the
> topic, are there any tips/secrets to avoiding the distortion of
> footrings
> when soda firing porcelain? My feet always droop between the balls of
> wadding.
>
> -katie

Hank Murrow on mon 29 sep 08


On Sep 29, 2008, at 9:59 AM, Katie Ellis wrote:

> I'm pretty sure the answer to my question is 'no', but while we're
> on the
> topic, are there any tips/secrets to avoiding the distortion of
> footrings
> when soda firing porcelain? My feet always droop between the balls of
> wadding.
>
> -katie

Dear Katie;

I have been seeing folks wad the center of their pieces with one
large wad to avoid the warping. Seems to work well, since the pot is
balanced in the center.

Cheers, Hank

Hank Murrow on mon 29 sep 08


On Sep 29, 2008, at 11:37 AM, gayle bair wrote:

> Hi Katie,
>
> I've not soda fired but is there any reason one cannot make and use a
> flattened ring of wadding?
>

Dear Gayle;

I think most folks wadding their soda work want the vapor to reach
the bottom. Thus the spaces between.

Cheers, Hank

Katie Ellis on wed 1 oct 08


Thanks for all the help! The soda kiln is cooling right now...we'll see how
the experimental wadding came out. :)