Fred Parker on wed 9 may 07
I want to coat the interiors of some stoneware bowls with porcelain slip.
Will this work, or will the difference in expansion/shrinkage be a
problem? I'd appreciate any advice.
Many thanks,
Fred Parker
William & Susan Schran User on thu 10 may 07
On 5/9/07 11:53 PM, "Fred Parker" wrote:
> I want to coat the interiors of some stoneware bowls with porcelain slip.
> Will this work, or will the difference in expansion/shrinkage be a
> problem? I'd appreciate any advice.
I have done this.
If the application of the porcelain slip is not thick, it works fine.
A thicker application may have shrinkage difference issues.
--
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
Lee Love on thu 10 may 07
On 5/10/07, Fred Parker wrote:
> I want to coat the interiors of some stoneware bowls with porcelain slip.
> Will this work, or will the difference in expansion/shrinkage be a
> problem? I'd appreciate any advice.
Are you using a porcelain clay body? I would do a test.
Back home, I used a white stoneware "SuperWhite" on fireclay
stoneware, from Continental Clay. If I recall, they had the same
shrinkage. It worked fine.
--
Lee in Mashiko, Japan
Minneapolis, Minnesota USA
http://mashikopots.blogspot.com/
"To affect the quality of the day, that is the highest of arts." -
Henry David Thoreau
"Let the beauty we love be what we do." - Rumi
Ivor and Olive Lewis on fri 11 may 07
Dear Fred Parker=20
You ask " I want to coat the interiors of some stoneware bowls with =
porcelain slip. Will this work, or will the difference in =
expansion/shrinkage be a problem? I'd appreciate any advice."
Any problems will arise mainly because of differences in water content =
of dissimilar clays.
My suggestion would be to make sure the Porcelain slip is well =
deflocculated and has only enough water for it to flow to form a smooth =
ripple free surface.
Hopefully this will allow shrinkage of the exterior clay to put a mild =
degree of compression on the porcelain.
In the end you just have to try these things out. Lack of success is not =
failure but an important learning experience.
Best regards,
Ivor Lewis.
Redhill,
South Australia.
Ron Roy on fri 11 may 07
Hi Fred,
Best to try and get the expansion/contraction of the two clays close - you
can use the fit testing glazes in chapter five. Take a look at the charts
for the 4 clays included there to give some idea about the different
expansion rates for the different bodies.
What you really need to do is make sure the slip is not a lower expansion
clay than the outer clay or you may get dunting in either the bisque or
glaze - or even both.
I'd be glad to help with this - RR
>I want to coat the interiors of some stoneware bowls with porcelain slip.
>Will this work, or will the difference in expansion/shrinkage be a
>problem? I'd appreciate any advice.
>
>Many thanks,
>
>Fred Parker
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Eleanora Eden on sat 19 may 07
This worked for me at ^10 and works for me now at ^3 and low fire.
Never had fit problems, just used what I had in the studio. I think it
is a great way to have your cake and eat it too, the ease of stoneware
and the surface of porcelain. I didn't use a slip, I just used the goop
from throwing porcelain as a slip on the stoneware. Worked fine.
Eleanora
>I want to coat the interiors of some stoneware bowls with porcelain slip.
>Will this work, or will the difference in expansion/shrinkage be a
>problem? I'd appreciate any advice.
>
>Many thanks,
>
>Fred Parker
--
Bellows Falls Vermont
www.eleanoraeden.com
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