Meika Alberici on sun 28 nov 99
I am having a problem with 'dripping slip' after the glaze firing.
Basically, I brush a 2-3" band of slip on to a white stoneware, leather hard
pot. I carve designs into the slip, and it makes it through the bisque fire
just fine.
It's after the transparent glaze is applied, and the glaze fire at cone 6,
that the slip is running, dripping down the pot. The colored slip is
noticeably running down the white pot.
Anyone out there who works with slip ever have this problem....??? Did you
find a solution.....???
Thanks.
Meika
Jeanne Wood on mon 29 nov 99
Hi Meika,
I use the same technique for many of my pots.
What you might check is...
Are you firing too hot for your glaze recipe?
Possibly you should find another slip recipe (do you
use a slip or an englobe?) Check the archives for Bill
Ferrow's Slip (englobe) which I posted on here about a
month ago.
Good luck,
Jeanne
--- Meika Alberici wrote:
> ----------------------------Original
> message----------------------------
> I am having a problem with 'dripping slip' after the
> glaze firing.
>
> Basically, I brush a 2-3" band of slip on to a white
> stoneware, leather hard
> pot. I carve designs into the slip, and it makes it
> through the bisque fire
> just fine.
> It's after the transparent glaze is applied, and the
> glaze fire at cone 6,
> that the slip is running, dripping down the pot.
> The colored slip is
> noticeably running down the white pot.
>
> Anyone out there who works with slip ever have this
> problem....??? Did you
> find a solution.....???
>
> Thanks.
> Meika
>
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Earl Brunner on mon 29 nov 99
Where are you getting your slip? Specifically is your slip a stoneware slip?
One of the best ways t0 make slip is to make it out of the same body that you
make the pot out of. If you do this, it should be a perfect fit to your pot.
Since you are using a white stoneware you should be able to get pretty good
color by adding the colorants to the slip.
Meika Alberici wrote:
> ----------------------------Original message----------------------------
> I am having a problem with 'dripping slip' after the glaze firing.
>
> Basically, I brush a 2-3" band of slip on to a white stoneware, leather hard
> pot. I carve designs into the slip, and it makes it through the bisque fire
> just fine.
> It's after the transparent glaze is applied, and the glaze fire at cone 6,
> that the slip is running, dripping down the pot. The colored slip is
> noticeably running down the white pot.
>
> Anyone out there who works with slip ever have this problem....??? Did you
> find a solution.....???
>
> Thanks.
> Meika
--
Earl Brunner
http://coyote.accessnv.com/bruec
mailto:bruec@anv.net
Lorraine Pierce on mon 29 nov 99
Meika, from what you have writen, I believe the slip you are using matures at a
lower temperature than ^6...if you need a cone six recipe let me know...or if
you can find a copy of Rhodes Clay and Glazes for the Potter you will find his
recipes for slips to be used on damp, dry and bisqued ware. (Its under 'Engobe
Compositions'.) I use a slip to band my stoneware that I make by adding water to
my white ^6 clay body, making it into a smooth slurry in the blender, and
brushing it on my damp pot. It matures at the same cone as the body, and fires
to look like a white clay (no sheen). It can also have coloring oxides or stains
added of course. Hope this helps. Lori in New Port Richey Fl.
Meika Alberici wrote:
> ----------------------------Original message----------------------------
> I am having a problem with 'dripping slip' after the glaze firing.
>
> Basically, I brush a 2-3" band of slip on to a white stoneware, leather hard
> pot. I carve designs into the slip, and it makes it through the bisque fire
> just fine.
> It's after the transparent glaze is applied, and the glaze fire at cone 6,
> that the slip is running, dripping down the pot. The colored slip is
> noticeably running down the white pot.
>
> Anyone out there who works with slip ever have this problem....??? Did you
> find a solution.....???
>
> Thanks.
> Meika
Vince Pitelka on tue 30 nov 99
>I am having a problem with 'dripping slip' after the glaze firing.
>Basically, I brush a 2-3" band of slip on to a white stoneware, leather hard
>pot. I carve designs into the slip, and it makes it through the bisque fire
>just fine.
>It's after the transparent glaze is applied, and the glaze fire at cone 6,
>that the slip is running, dripping down the pot. The colored slip is
>noticeably running down the white pot.
Meika -
Something strange is going on here. A slip cannot drip in the firing,
unless you are high-firing a low-fire slip, or unless someone made a major
mistake in mixing the slip, and the recipe turned into a glaze rather than a
slip. One other possibility is that you are loading a high-fire slip with
too much iron, and are firing it in high-fire reduction, in which case the
slip can go liquid. Normally a slip is just a claybody mixed to liquid
consistency, and if it is an appropriate claybody for the intended firing
temperatures, and if it has not been overloaded with fluxes, then it cannot
drip in the firing.
It would be good to know where you got your slip. Did you make it yourself?
Is it just your claybody thinned with water? Or is a commercial slip? If
so, is it spedifically designated for your firing temperature? Is it a
regular slip for application to damp greenware, or is it an engobe for
application to bone-dry greenware or to bisqueware? Many engobes are
actually vitreous slips, and are actually somewhere between a slip and a
glaze. If you are using a vitreous engobe as a normal slip, it would not
take much to push it over the edge and get it to run in the glaze firing.
Good luck -
- Vince
Vince Pitelka
Home - vpitelka@DeKalb.net
615/597-5376
Work - wpitelka@tntech.edu
615/597-6801 ext. 111, fax 615/597-6803
Appalachian Center for Crafts
Tennessee Technological University
1560 Craft Center Drive, Smithville TN 37166
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