Dave Hedblom on wed 30 jul 97
I have a 60/40 wood ash glaze that I am having
a problem with. It flakes off of the pot when
it dries. It's a wonderful glaze color and texture
but it flakes and it is stable in the firing.
Is there anything I can add to the glaze to stop this
from happening?
claymoon@pconline.com
dave hedblom
Richard Aerni on thu 31 jul 97
Dave,
It would be hard to help without knowing how you apply the glaze, whether
it goes onto bisque ware or green ware, what is the 60, what is the other
40, etc. Without knowing this, about all I can say is to ask whether you
have anything in there to act as a binder? If not, simply try adding
some bentonite to the glaze to hold it on. I don't have problems with
wood ash flaking off pots before firing, but on some of my glazes that
want to "powder" on me when I touch them, bentonite, generally 2%, solves
the problem. CMC may also help. Can you send some more info?
Richard
Dave Hedblom wrote:
>
> ----------------------------Original message----------------------------
> I have a 60/40 wood ash glaze that I am having
> a problem with. It flakes off of the pot when
> it dries. It's a wonderful glaze color and texture
> but it flakes and it is stable in the firing.
>
> Is there anything I can add to the glaze to stop this
> from happening?
>
> claymoon@pconline.com
> dave hedblom
Craig Martell on thu 31 jul 97
Hi Dave:
If you could be more specific about the composition of the glaze,
suggestions would be easier to come by. How are you preparing the ash, is
it washed or no, how fine is it screened, any milling etc? I once milled an
ash glaze too long and the ulta-fine particles would not adhere to anything,
so this could be looked at. Is there any clay in the glaze? If not, you
may want to add bentonite, veegum T, or macaloid.
Regards, Craig Martell-Oregon
Ric Swenson on fri 1 aug 97
>----------------------------Original message----------------------------
>I have a 60/40 wood ash glaze that I am having
>a problem with. It flakes off of the pot when
>it dries. It's a wonderful glaze color and texture
>but it flakes and it is stable in the firing.
>
>Is there anything I can add to the glaze to stop this
>from happening?
>
>
>claymoon@pconline.com
>dave hedblom
--------reply-------------
Try VEE GUM CER from R T VanderBuilt Co. 203 853-1400 (Norwalk, CT.) they
can tell you the dealer closest to your location....Tech. support person is
Conrad Reigger.
HTH
Ric
Ric Swenson, Bennington College, Route 67 -A, Bennington, Vermont 05201-6001
802 442-5401 x 262 vox x 237 fax or dedicated fax 802 442-6164
email: rswenson@bennington.edu
Gary W. Wagoner on fri 1 aug 97
As others have already stated, it is neccessary to know what the 60
and the 40 are in your 60/40 ash glaze to tell why it might peel and flake
off the pots. I'm guessing the 40 is clay, a formula I've seen. If the
peeling is due to shrinkage in the raw glaze as it dries, you need to use a
less plastic clay and/or calcine some of the clay used. The formula I saw,
which produced some nice results, was 60 woodash 40 redart. You might be
wise to calcine half of the clay or substitute calcined kaolin for half the
redart (which would of course change the color of the glaze somewhat.)
Gary Wagoner
Auburn University
rebecca.j.knight on sun 3 aug 97
I'm sure one of the glaze gurus will have a better way, but this worked for
me. When I was in college we had an ash glaze that flaked on drying. As it
started to flake, I lightly misted it with water from a spray bottle. I
usually had to do this only once per pot. It would lay back down and stay
there. As long as I handled the pots carefully when loading, they fired just
fine. Luck, perhaps.
----------------------------Original message----------------------------
I have a 60/40 wood ash glaze that I am having
a problem with. It flakes off of the pot when
it dries. It's a wonderful glaze color and texture
but it flakes and it is stable in the firing.
Is there anything I can add to the glaze to stop this
from happening?
claymoon@pconline.com
dave hedblom
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