Jon Pettyjohn on fri 4 feb 00
Hi,
I'm baffled by this glaze effect and I'm wondering if
anyone is familiar with this glaze.
Recently I saw a few pots by Mineo Okabe with an
astonishing craze pattern at an exhibit here in Manila.
(Okabe was the son of the master shino potter Tokuro Kato
if you remember the story that Robert Yellin sent some
time ago).
The glaze is a dark gray green celadon, looks like high
fire reduction. The amazing thing is that the pattern of
crazing has a distinct crystalline shape, almost like a
snowflake that appears to have multiple layers, especially
where the glaze is thicker, at the bottom of a bowl for
example, and each "flake" has rings surrounding it that
give a strong 3D optical illusion. Looks almost as if there
are 3 or 4 distinct layers of glaze that have crazed
independly.
Anyone familiar with this? I can't remember seeing or
reading anything about this glaze before.
Jon Pettyjohn
jon@mozcom.com
Aline Salvat on sun 6 feb 00
------------------
hello clayart,
I've been =22lurking=22 for over a year now and I this is my first try out =
into
the open.
I am not a professonal potter, but these last few years ceramics has become
more than a hobby to me: a passion.
Nearly everything I know about it comes from clayart, so I never had
anything to contribute the list. Even the questions I could have asked were
always answered before I even formulated them, either in the current threads
or in the archives.
But this time maybe I have something?
I have always admired those crackled celadons and wondered how I could
reproduce them (at one time I thought they required two different glazes and
two firings).
Then at our local school of art someone came up with a glaze with that sort
of crackle, and it is incredibly simple to make=21
Base J cone 10 (1300 F)
Neph sye 90
whiting 3.3
kaolin 3.3
silica 3.3
Must be applied very thickly. Works with all oxides. Best when it stays
transparent, but even small amounts of Ti or Sn give good results
(opalescent with crystals and crackle where VERY thick)
Not as stunning as what the Japanese or Chinese masters have produced, but
maybe we're on the right track: we keep testing... The crackle is smaller
and more irregular, but it looks the same. (Perhaps the glaze needs to be
even thicker)
All the best,
Aline
Aline Salvat - aline.salvat=40wanadoo.fr
Beauvais, France
----- Message d'origine -----
De : Jon Pettyjohn =3Cjon=40mozcom.com=3E
=C0 : =3CCLAYART=40LSV.UKY.EDU=3E
Envoy=E9 : vendredi 4 f=E9vrier 2000 23:41
Objet : 3D Crackle Effect ?
=3E ----------------------------Original message----------------------------
=3E Hi,
=3E
=3E I'm baffled by this glaze effect and I'm wondering if
=3E anyone is familiar with this glaze.
=3E
=3E Recently I saw a few pots by Mineo Okabe with an
=3E astonishing craze pattern at an exhibit here in Manila.
=3E (Okabe was the son of the master shino potter Tokuro Kato
=3E if you remember the story that Robert Yellin sent some
=3E time ago).
=3E
=3E The glaze is a dark gray green celadon, looks like high
=3E fire reduction. The amazing thing is that the pattern of
=3E crazing has a distinct crystalline shape, almost like a
=3E snowflake that appears to have multiple layers, especially
=3E where the glaze is thicker, at the bottom of a bowl for
=3E example, and each =22flake=22 has rings surrounding it that
=3E give a strong 3D optical illusion. Looks almost as if there
=3E are 3 or 4 distinct layers of glaze that have crazed
=3E independly.
=3E
=3E Anyone familiar with this? I can't remember seeing or
=3E reading anything about this glaze before.
=3E
=3E Jon Pettyjohn
=3E jon=40mozcom.com
Russel Fouts on sun 6 feb 00
Jon,
>> I'm baffled by this glaze effect and I'm wondering if anyone is familiar
with this glaze. Recently I saw a few pots by Mineo Okabe with an
astonishing craze pattern at an exhibit here in Manila. (Okabe was the son
of the master shino potter Tokuro Kato if you remember the story that Robert
Yellin sent some time ago). The glaze is a dark gray green celadon, looks
like high fire reduction. The amazing thing is that the pattern of crazing
has a distinct crystalline shape, almost like a snowflake that appears to
have multiple layers, especially where the glaze is thicker, at the bottom
of a bowl for example, and each "flake" has rings surrounding it that give a
strong 3D optical illusion. Looks almost as if there are 3 or 4 distinct
layers of glaze that have crazed independly. Anyone familiar with this? I
can't remember seeing or reading anything about this glaze before. <<
Beautiful isn't it?
I've seen this glaze in blue, gray and green. I think there are a number of
Japanese potters doing it and have only seen it once here in Belgium.
Unfortunately I can't remember who it was. I've put a picture of one made in
1975 by Shimizu Uichi on the "Clayart Show Window" page on my web site,
http://www.mypots.com The pot is owned by Shiseido France.
Robert Yellin wrote an article about another potter, Seiko Minegishi who
also does does this glaze. You can see it on his site at
www.japanesepottery.com. Choose the "Potter Spotlight" tab and choose S.
Minegishi from the top of the list.
The Japanese describe it as a celedon (seiji). Description for the one above
is "Moegi kannyu hachi", if that's any clue.
I'm also curious as to how this is done.
Russel
Russel Fouts
Mes Potes & Mes Pots
Brussels, Belgium
Tel: +32 2 223 02 75
Mobile: +32 476 55 38 75
Http://www.mypots.com
http://www.Japan-Net.ne.jp/~iwcat
Stephen Grimmer on mon 7 feb 00
Jon & Russel (and Robert),
I've recently been looking at Lung-chuan and Kuan wares, too. There's a
Japanese fellow named Shimada Koichi who's celadons in this style are
breathtaking. I saw his work in a new box set from Japan titled, "Toward a
21th (sic) Century Ceramics." He has a chocolate-firing body that he glazes
fires in a large wood kiln. I don't think anyone else comes close to what
he's doing. Anyone else heard of him?
steve
--
Steve Grimmer
Bowling Green State University
Bowling Green, OH
----------
>From: Russel Fouts
>To: CLAYART@LSV.UKY.EDU
>Subject: Re: 3D Crackle Effect ?
>Date: Sun, Feb 6, 2000, 4:21 PM
>
> ----------------------------Original message----------------------------
>
> Jon,
>
>>> I'm baffled by this glaze effect and I'm wondering if anyone is familiar
> with this glaze. Recently I saw a few pots by Mineo Okabe with an
> astonishing craze pattern at an exhibit here in Manila. (Okabe was the son
> of the master shino potter Tokuro Kato if you remember the story that Robert
> Yellin sent some time ago). The glaze is a dark gray green celadon, looks
> like high fire reduction. The amazing thing is that the pattern of crazing
> has a distinct crystalline shape, almost like a snowflake that appears to
> have multiple layers, especially where the glaze is thicker, at the bottom
> of a bowl for example, and each "flake" has rings surrounding it that give a
> strong 3D optical illusion. Looks almost as if there are 3 or 4 distinct
> layers of glaze that have crazed independly. Anyone familiar with this? I
> can't remember seeing or reading anything about this glaze before. <<
>
> Beautiful isn't it?
>
> I've seen this glaze in blue, gray and green. I think there are a number of
> Japanese potters doing it and have only seen it once here in Belgium.
> Unfortunately I can't remember who it was. I've put a picture of one made in
> 1975 by Shimizu Uichi on the "Clayart Show Window" page on my web site,
> http://www.mypots.com The pot is owned by Shiseido France.
>
> Robert Yellin wrote an article about another potter, Seiko Minegishi who
> also does does this glaze. You can see it on his site at
> www.japanesepottery.com. Choose the "Potter Spotlight" tab and choose S.
> Minegishi from the top of the list.
>
> The Japanese describe it as a celedon (seiji). Description for the one above
> is "Moegi kannyu hachi", if that's any clue.
>
> I'm also curious as to how this is done.
>
> Russel
>
> Russel Fouts
> Mes Potes & Mes Pots
> Brussels, Belgium
> Tel: +32 2 223 02 75
> Mobile: +32 476 55 38 75
> Http://www.mypots.com
> http://www.Japan-Net.ne.jp/~iwcat
David McDonald on mon 7 feb 00
Russell,
What an incredible bowl! I too have seen these kinds of glazes before,
and they've always blown my mind. Such stunning beauty. The way that
those crackles can refract light. They have such depth.
How to achieve this kind of glaze and effect is known by more than a
few, I'm guessing. While I was in Santa Monica, CA last year for a show,
I visited a Peet's Coffee shop down the street from the show, and they
had a whole line of functional wares with these kinds a of glazes! As I
recall they came in a silverish white, blue, green, yellowish gold.
Manufactured in Japan, the quality was supreme, so the Japanese pottery
industry certainly can reproduce this type of glaze. Now I'm not saying
that these pieces approached the beauty of the Shimizu Uichi piece you
have shown on your website. But hey, anyone know how WE can produce a
glaze like this? I SUSPECT that firing it just right has more than a
little to do with it.
Also enjoyed the Japanese urinals and toilets you show at that site.
Those Japanese! What will they think of next? David
On Sun, 6 Feb 2000 17:21:28 EST Russel Fouts
writes:
> ----------------------------Original
> message----------------------------
>
> Jon,
>
> >> I'm baffled by this glaze effect and I'm wondering if anyone is
> familiar
> with this glaze. Recently I saw a few pots by Mineo Okabe with an
> astonishing craze pattern at an exhibit here in Manila. (Okabe was
> the son
> of the master shino potter Tokuro Kato if you remember the story
> that Robert
> Yellin sent some time ago). The glaze is a dark gray green celadon,
> looks
> like high fire reduction. The amazing thing is that the pattern of
> crazing
> has a distinct crystalline shape, almost like a snowflake that
> appears to
> have multiple layers, especially where the glaze is thicker, at the
> bottom
> of a bowl for example, and each "flake" has rings surrounding it
> that give a
> strong 3D optical illusion. Looks almost as if there are 3 or 4
> distinct
> layers of glaze that have crazed independly. Anyone familiar with
> this? I
> can't remember seeing or reading anything about this glaze before.
> <<
>
> Beautiful isn't it?
>
> I've seen this glaze in blue, gray and green. I think there are a
> number of
> Japanese potters doing it and have only seen it once here in
> Belgium.
> Unfortunately I can't remember who it was. I've put a picture of one
> made in
> 1975 by Shimizu Uichi on the "Clayart Show Window" page on my web
> site,
> http://www.mypots.com The pot is owned by Shiseido France.
>
> Robert Yellin wrote an article about another potter, Seiko Minegishi
> who
> also does does this glaze. You can see it on his site at
> www.japanesepottery.com. Choose the "Potter Spotlight" tab and
> choose S.
> Minegishi from the top of the list.
>
> The Japanese describe it as a celedon (seiji). Description for the
> one above
> is "Moegi kannyu hachi", if that's any clue.
>
> I'm also curious as to how this is done.
>
> Russel
>
> Russel Fouts
> Mes Potes & Mes Pots
> Brussels, Belgium
> Tel: +32 2 223 02 75
> Mobile: +32 476 55 38 75
> Http://www.mypots.com
> http://www.Japan-Net.ne.jp/~iwcat
David McDonald
Limberlost Pottery
721 First Street
Prescott,AZ 86301
(520)778-7854 claydog@juno.com
________________________________________________________________
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Emily & Kurt Kiewel on tue 8 feb 00
I'm almost positive that this effect is caused by large amounts of soda
feldspar in the glaze. I saw a lot of this glaze in Japan too, gray, blue,
or green. In fact I have a bowl that I threw and my sensei glazed for me
in celadon that has a bit of this effect, but not as thick. I was lucky
enough to learn his throwing techniques but his glazes were SECRET!
Emily
Enjoying spring-like weather in Texas
John K Dellow on tue 8 feb 00
I have a sake cup with this glaze on by Kyoto potter Toshio
Furukawa
In one of wife's' Japanese glaze books the following recipe is
given as a starting point.
any feldspar 70%
clear glass powder 30%
Fire to C9 in oxidizing atmosphere on a dark stoneware body.
Does not like colouring oxides in the glaze ,but colour can be
added by staining the body or putting a clear coloured glaze
over it.
I can safely assume its going to need CMC or some other
suspending agent. Looks like it also needs a thick application.
John Dellow "the flower pot man"
Home Page http://www.welcome.to/jkdellow
http://digitalfire.com/education/people/dellow/
Bob Hollis on wed 9 feb 00
John,
I just took 6 bowls out of the kiln this morning and you are correct in s
needs to be thick, my bowls are glazed with a copper red glaze which I apply thi
twice.Only part of the glaze turned red and this part has no crackle to be seen,
the crackle is underneath the glaze but the bit which did not turn red the crack
clearly seen under a clear glaze which is not cracked at all.The islands formed
are pale blue to green in colour.
Regards,
Bob Hollis
> ** Original Subject: RE: 3D Crackle Effect ?
> ** Original Sender: John K Dellow
> ** Original Date: 8 Feb 2000 19:25:06 -0000
> ** Original Message follows...
>
> ----------------------------Original message----------------------------
> I have a sake cup with this glaze on by Kyoto potter Toshio
> Furukawa
> In one of wife's' Japanese glaze books the following recipe is
> given as a starting point.
> any feldspar 70%
> clear glass powder 30%
> Fire to C9 in oxidizing atmosphere on a dark stoneware body.
> Does not like colouring oxides in the glaze ,but colour can be
> added by staining the body or putting a clear coloured glaze
> over it.
> I can safely assume its going to need CMC or some other
> suspending agent. Looks like it also needs a thick application.
>
>
>
>
>
> John Dellow "the flower pot man"
>** --------- End Original Message ----------- **
>
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