Elizabeth Priddy on wed 18 jun 08
I'm feelin the heat on being too sensitive on the jokes so I will let it go=
for now.
=A0
Re your other topic:
=A0
Bloating on me looks like I am about five months in and the only correction=
for it is a lot of hot tea.
=A0
Now let's wait while the men scratch their chins and think real hard....
Elizabeth Priddy
Beaufort, NC - USA
Natural Instincts Conference Information:
http://downtothepottershouse.com/NaturalInstincts.html
http://www.elizabethpriddy.com
http://www.flickr.com/photos/7973282@N03/
--- On Wed, 6/18/08, Lili Krakowski wrote:
From: Lili Krakowski
Subject: Misc: Bloating; firing c.10 at c. 6; blonde jokes
To: CLAYART@LSV.CERAMICS.ORG
Date: Wednesday, June 18, 2008, 5:24 PM
Bloating is a body fault. Causes can vary from impurities in the body
burning out and the ensuing gases (just now, on the last day of Kindergarte=
n
I learned the word "ensuing". Isn't it great?) cannot escape. =20
Sometimes
it just is that the surface of the clay vitrifies too soon for the gases
generated by whatever is in the body to get out. In the latter case--which
I have encountered with no-longer-used high manganese bodies, adding sand o=
r
fine grog helped.
The bloats look like kidney beans or peas introduced under the surface of
the body. Sort of like the blueberries in blueberry pancakes. When smashe=
d
open the bloats (NOT the blueberries....what kind of a person smashes
blueberries?) show an empty space, and sometimes an empty space with some
stuff in it--whatever caused the bloat.
It seems to me from your description that it "basically looks just like a
bubble burst open and froze[n] there, sometimes with sharp edges"
sometimes
just pinholes, that you are dealing with a glaze that does not get cooked
through. Now that is a culinary term serious potters sneer at but it is
exactly on target right.
I am taking a guess that your thicker pots generate more gas than the thin
walled ones. Ok. That is wrong. Try again.
It takes 1000 people more time to leave a room through a given door than it
does 100 people. Can we agree on that? Fine.
If I have a coffee mug--just to give an example--4" x 4" and 1/4 inch
thick
each unit of gas that needs to escape has X surface to escape through. But
if the 4" x 4" mug is 1" thick, then there are more units of gas
(more clay)
still trying to escape through the same surface area.
Why some glazes, not others? That has to do with the firing cycle of the
glaze proper. And what stage of "development" it is at when the
cooling
starts.
Suggestions: Bisque higher. This should give your clay time and heat to ge=
t
rid of more stuff that burns out. Fire glaze more slowly, cool more slowly=
.
The slower firing may allow more time to let the gases out before the body
"cooks" and slower cooling should allow better healing.
Now as to a c.10 body and a c.6 glaze.
As told a body describes as c.10 should perform ok at c.8-12. Just about.
Remember that in very large kilns there is a variation of heat --hot spots,
cool spots. A glaze designed for c. 10 should work properly in that range.
No, the results will not be identical, we are not talking identical we are
talking functionally ok.
So if you take a c.10 body and fire it at c. 6 it essentially is underfired=
.
It will shrink less, and be more porous because less vitrified. That means
that if your c.10 body fired to c.10 does not leak, sweat, absorb at all, a=
t
c.6 IT WILL! Keep that vase off my French polish! Can you use the c.10
fired at c.6 as a cookie plate, a pencil holder, and like that? Sure. Jus=
t
be aware that the pot is likely to be porous, sweat, absorb...
As to jokes about blondes. Elizabeth, this grayed brunette is with you!
PC has banned jokes about X's and Y's, not to mention Z's. Oh, we
used to
tell such side-splitting, thigh slapping jokes about Zs!!!!! So now one ca=
n
tell jokes only about people of the Dominant Culture. And you
blondes...gee, you is it! It is sexist and bigoted, and not nice at all.
So there was this dark haired man, and the phone rings in the middle of the
night, and he picks it up. A man asks: "Honey, is the coast clear?"
And
the dark haired man says:" How should I know. We are 200 miles from the
coast!" Which reminds me. There still are endless jokes out there
about
the toll age takes on women, women's bodies. Just try to tell a joke about
what age does to men and their bods....PMS is hilarious as we all
know....but tell a Viagra joke....and wow!
Lili Krakowski
Be of good courage=0A=0A=0A
Lili Krakowski on wed 18 jun 08
Bloating is a body fault. Causes can vary from impurities in the body
burning out and the ensuing gases (just now, on the last day of Kindergarten
I learned the word "ensuing". Isn't it great?) cannot escape. Sometimes
it just is that the surface of the clay vitrifies too soon for the gases
generated by whatever is in the body to get out. In the latter case--which
I have encountered with no-longer-used high manganese bodies, adding sand or
fine grog helped.
The bloats look like kidney beans or peas introduced under the surface of
the body. Sort of like the blueberries in blueberry pancakes. When smashed
open the bloats (NOT the blueberries....what kind of a person smashes
blueberries?) show an empty space, and sometimes an empty space with some
stuff in it--whatever caused the bloat.
It seems to me from your description that it "basically looks just like a
bubble burst open and froze[n] there, sometimes with sharp edges" sometimes
just pinholes, that you are dealing with a glaze that does not get cooked
through. Now that is a culinary term serious potters sneer at but it is
exactly on target right.
I am taking a guess that your thicker pots generate more gas than the thin
walled ones. Ok. That is wrong. Try again.
It takes 1000 people more time to leave a room through a given door than it
does 100 people. Can we agree on that? Fine.
If I have a coffee mug--just to give an example--4" x 4" and 1/4 inch thick
each unit of gas that needs to escape has X surface to escape through. But
if the 4" x 4" mug is 1" thick, then there are more units of gas (more clay)
still trying to escape through the same surface area.
Why some glazes, not others? That has to do with the firing cycle of the
glaze proper. And what stage of "development" it is at when the cooling
starts.
Suggestions: Bisque higher. This should give your clay time and heat to get
rid of more stuff that burns out. Fire glaze more slowly, cool more slowly.
The slower firing may allow more time to let the gases out before the body
"cooks" and slower cooling should allow better healing.
Now as to a c.10 body and a c.6 glaze.
As told a body describes as c.10 should perform ok at c.8-12. Just about.
Remember that in very large kilns there is a variation of heat --hot spots,
cool spots. A glaze designed for c. 10 should work properly in that range.
No, the results will not be identical, we are not talking identical we are
talking functionally ok.
So if you take a c.10 body and fire it at c. 6 it essentially is underfired.
It will shrink less, and be more porous because less vitrified. That means
that if your c.10 body fired to c.10 does not leak, sweat, absorb at all, at
c.6 IT WILL! Keep that vase off my French polish! Can you use the c.10
fired at c.6 as a cookie plate, a pencil holder, and like that? Sure. Just
be aware that the pot is likely to be porous, sweat, absorb...
As to jokes about blondes. Elizabeth, this grayed brunette is with you!
PC has banned jokes about X's and Y's, not to mention Z's. Oh, we used to
tell such side-splitting, thigh slapping jokes about Zs!!!!! So now one can
tell jokes only about people of the Dominant Culture. And you
blondes...gee, you is it! It is sexist and bigoted, and not nice at all.
So there was this dark haired man, and the phone rings in the middle of the
night, and he picks it up. A man asks: "Honey, is the coast clear?" And
the dark haired man says:" How should I know. We are 200 miles from the
coast!" Which reminds me. There still are endless jokes out there about
the toll age takes on women, women's bodies. Just try to tell a joke about
what age does to men and their bods....PMS is hilarious as we all
know....but tell a Viagra joke....and wow!
Lili Krakowski
Be of good courage
| |
|
