Lee on wed 14 sep 11
Could the smaller kiln be cooling faster? Does she need to cool and hold?
--
Lee Love in Minneapolis
http://mingeisota.blogspot.com/
"Ta tIr na n-=3DF3g ar chul an tI=3D97tIr dlainn trina ch=3DE9ile"=3D97tha=
t is, "T=3D
he land
of eternal youth is behind the house, a beautiful land fluent within
itself." -- John O'Donohue
Lili Krakowski on wed 14 sep 11
May writes" New studio mate ... found her glaze crazed at the new set =3D
up;
same clay, same slip, same glaze. The most obvious difference ... a =3D
smaller size kiln. The glaze is a cone 05 glossy and she was doing a =3D
"cone fire" program. What can we do to compensate for the change so that =
=3D
this once trial-&-true glaze doesn't
craze?"
I do not know what a "cone fire" program is.
I also believe--sorry, yell at me, go right ahead--that her glaze =3D
probably did craze--but not right away! Delayed crazing is one of those =
=3D
things.. Glazes are like lovers--trust them at your own peril...
I am used to conventional kilns. A small kiln tends to fire quicker, =3D
cool quicker. But I think of that as a useful stress test.
Having said that:
What is the glaze recipe?=3D20
You write: "same clay, same slip, same glaze." Is that a true fact =3D
(apparently Emerson coined that strange useful term.
Did she bring the clay, slip, bucket of glaze with her? Or did she use =
=3D
same brand clay, slip made from same materials, glaze made from same =3D
materials as before?
Endless, cruel, anecdotal evidence that clay bodies using same name =3D
change over the years--both from the nature of the mined materials, and =3D
from changes in the body made necessary by the supplies the manufacturer =
=3D
can get. (Or why I nag that one always should keep a supply of test =3D
tiles from each batch of body one gets ...to be able to test in cases =3D
as above--when (here a possibility) the batch used now is slightly =3D
different from previous batch.
Please supply the recipe.....
Lili Krakowski
Be of good courage
May Luk on wed 14 sep 11
Lili;
"cone fire" is that dreadful factory pre-programmed button. You only
have to punch in the end cone number, specify slow, med or fast for a
firing. Like the "baked potato" button on the microwave, it will do
the work for you no matter how big is the potato.
I don't know the recipe as I did not ask. I do know she has a big
bucket of those trademarked blue store bought earthenware glaze, but I
cannot confirm that she used those for the firings.
Turn out she did change the bisque firing temperature from cone 04 to
cone 06. Now we have something to work on.
Thanks
May
Brooklyn NY
On Wed, Sep 14, 2011 at 9:24 AM, Lili Krakowski w=
=3D
rote:
> May writes" New studio mate ... found her glaze crazed at the new set up;
> same clay, same slip, same glaze. The most obvious difference ... a small=
=3D
er size kiln. The glaze is a cone 05 glossy and she was doing a "cone fire"=
=3D
program. What can we do to compensate for the change so that this once tri=
=3D
al-&-true glaze doesn't
> craze?"
>
> I do not =3DA0know what a "cone fire" program is.
>
> I also =3DA0believe--sorry, yell at =3DA0me, go right ahead--that her gla=
ze p=3D
robably did craze--but not right away! =3DA0Delayed crazing is one of those=
t=3D
hings.. =3DA0Glazes are like lovers--trust them at your own peril...
>
> I am used to conventional kilns. =3DA0A small kiln tends to fire quicker,=
c=3D
ool quicker. But I think of that as a useful stress test.
>
> Having said that:
>
> What is the glaze recipe?
>
> You write: "same clay, same slip, same glaze." Is that a true fact (appar=
=3D
ently Emerson coined that strange useful term.
>
> Did she bring the clay, slip, bucket of glaze with her? =3DA0Or did she =
=3DA0=3D
use same brand clay, slip made from same materials, glaze made from same ma=
=3D
terials as before?
>
> Endless, cruel, anecdotal evidence that clay bodies using same name chang=
=3D
e over the years--both from the nature of the mined materials, and from cha=
=3D
nges in the body made necessary by the supplies the manufacturer can get. =
=3D
=3DA0(Or why I nag that one always should keep a supply of test tiles from =
ea=3D
ch batch of body one gets ...to be able to test in =3DA0cases as above--whe=
n =3D
(here a possibility) the batch used now is slightly different from previous=
=3D
batch.
>
> Please supply the recipe.....
>
>
> Lili Krakowski
> Be of good courage
>
--=3D20
http://twitter.com/MayLuk
http://www.ceramicsbrooklyn.com/
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