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shino over under

updated mon 13 feb 12

 

Hank Murrow on fri 3 feb 12


On Feb 3, 2012, at 4:48 PM, Vince Pitelka wrote:

> Shinos are so rich and so beautiful when used sensitively and =3D
creatively.
> Our rule is "Shino first or you'll be cursed" Yeah, I know it is an =3D
old
> clich=3DE9, but like lots of old clich=3DE9s, it is true. If you put any=
=3D
glaze
> under a shino containing soda ash, it will bubble and froth and ruin =3D
the
> pot. On the other hand, some glazes tastefully applied are wonderful =3D
over
> shino. I have a beautiful gold shino mug by Joe Winter, a wonderful =3D
potter
> in Red Rock Canyon, Nevada. It has copper red drips over the shino, =3D
and it
> almost hurts your eyes. Almost.
>=3D20
> Hank Murrow does some wonderful subtle effects with glazes or oxide =3D
patinas
> over shino. Like Mel says, you have to know what you are doing, but
> trailing or brushing glazes over shino is a lot of fun and you won't =3D
know
> what you can get away with until you take some risks. Remember that =3D
the best
> learning comes from taking risks.

True Vince;=3D20

But I also use a black glaze(Pat's Black) under my shino with great =3D
results, in fact I think the plates I made for you have Pat's under =3D
Hank's Shino. The effect is like ice breaking up on the river in Spring =3D
melt. I tried most of my glazes under the shino at least once=3D85 using =
=3D
the best combinations for extended production.

The biggest risks I have taken in search of Shino involved the firing, =3D
first lowering the onset of reduction, then doing a soak in Oxidation =3D
during the cooling period.

Good thing that I stay healthy, because it may take another 25 years!

Cheers, Hank=3D

mel jacobson on fri 3 feb 12


if you know what you are doing, understand what
is in your glaze and clay...you can do most anything.
only a few can do that.

http://www.visi.com/~melpots/
clayart page below:
http://www.visi.com/~melpots/clayart.html

Vince Pitelka on fri 3 feb 12


Shinos are so rich and so beautiful when used sensitively and =3D
creatively.
Our rule is "Shino first or you'll be cursed" Yeah, I know it is an old
clich=3DE9, but like lots of old clich=3DE9s, it is true. If you put any =
=3D
glaze
under a shino containing soda ash, it will bubble and froth and ruin the
pot. On the other hand, some glazes tastefully applied are wonderful =3D
over
shino. I have a beautiful gold shino mug by Joe Winter, a wonderful =3D
potter
in Red Rock Canyon, Nevada. It has copper red drips over the shino, and =
=3D
it
almost hurts your eyes. Almost.

Hank Murrow does some wonderful subtle effects with glazes or oxide =3D
patinas
over shino. Like Mel says, you have to know what you are doing, but
trailing or brushing glazes over shino is a lot of fun and you won't =3D
know
what you can get away with until you take some risks. Remember that the =3D
best
learning comes from taking risks.
- Vince

Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net
http://iweb.tntech.edu/wpitelka/

Vince Pitelka on sat 4 feb 12


I wrote:
"If you put any glaze under a shino containing soda ash, it will bubble and
froth and ruin the pot."

John Britt wrote;
"This is incorrect. It is not the soda ash that is the culprit, it is the
clay percentage."

Hi John. Could you explain the mechanics of this? Why is it that other
glazes we have containing as much clay never cause this problem. We have tw=
o
shinos among our stock cone 10 glazes, and both cause this problem if you
put any other glaze under them. We have a number of other glazes that
contain just as much clay that never cause this problem. The difference
seems to be the soda ash.
- Vince

John Britt on sat 4 feb 12


Vince,

You write:

"If you put any glaze under a shino containing soda ash, it will bubble a=
=3D
nd froth=3D20
and ruin the pot."

This is incorrect. It is not the soda ash that is the culprit, it is the =
=3D
clay=3D20
percentage.

It is easy to test. (This glaze has soda ash) Try this glaze and put anyt=
=3D
hing=3D20
over or under and report back.


PENN STATE SHINO=3D09=3D09Cone 10 Reduction

34.00=3D09F-4 Feldspar
29.00=3D09Spodumene=3D20=3D20=3D20=3D20=3D20=3D20=3D20=3D20=3D20=3D20=3D20=
=3D20=3D20=3D20=3D20=3D20=3D20=3D20=3D20=3D
=3D20=3D20=3D20=3D20=3D20=3D20=3D20=3D20=3D20=3D20=3D20=3D20=3D20=3D20
14.60=3D09Nepheline Syenite =3D09=3D20=3D20=3D20=3D20=3D=
20=3D20=3D20=3D20=3D20=3D
=3D20=3D20=3D20=3D20=3D20=3D20
9.70=3D09EPK Kaolin=3D20=3D20
4.90=3D09Kentucky Ball Clay
7.80=3D09Soda Ash

Vince Pitelka on sun 5 feb 12


I don't have any pictures of the problem, but it is easy to describe. It i=
s
just a very crusty surface of very small bubbles wherever the other glaze i=
s
under the shino. think we have the answer from the contributions of others=
.
It makes sense that a soda-ash-containing shino seals over at a much lower
temperature than other glazes, and yet it contains a lot of clay and
maintains its viscosity. So glazes underneath releasing volatiles tend to
make the shino bubble, and since it is a stiff glaze it preserves those
bubbles. Shinos with no soda ash like Hank's shinos don't tend to do this.
Does this make sense?
- Vince

Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net
http://iweb.tntech.edu/wpitelka/

John Britt on sun 5 feb 12


Vince,

Well maybe you are right. What are the recipes and let's see if we can f=
=3D
ind the=3D20
reason.

John Britt

Vince Pitelka on sun 5 feb 12


John Britt wrote:
"Well maybe you are right. What are the recipes and let's see if we can
find the reason."

Hi John -
If you go to
http://iweb.tntech.edu/wpitelka/syllabi-handouts/handouts/stock%20glazes.ht=
m
, Mamo matt has 22.6% clay, Shaner red has 23%, Reitz purple has 25%, Hamad=
a
green has 22.4%, and satin doll has 40% clay. The two shinos we use most
often are on the same page - Gustin shino with 25% clay and porcelain shino
with 17%.

If for any reason the link above doesn't work, just Google my name to get t=
o
my website, click "syllabi and handouts," click "handouts and information,"
and click "ACC Stock Glazes" in the center column.
- Vince

Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net
http://iweb.tntech.edu/wpitelka/

John Britt on sun 5 feb 12


Vince,

Finishing a workshop but will try to think on it tomorrow.

Any photo samples of the problems?

On Sun, Feb 5, 2012 at 11:12 AM, Vince Pitelka wrote:

> John Britt wrote:
> "Well maybe you are right. What are the recipes and let's see if we can
> find the reason."
>
> Hi John -
> If you go to
>
> http://iweb.tntech.edu/wpitelka/syllabi-handouts/handouts/stock%20glazes.=
htm
> , Mamo matt has 22.6% clay, Shaner red has 23%, Reitz purple has 25%,
> Hamada
> green has 22.4%, and satin doll has 40% clay. The two shinos we use most
> often are on the same page - Gustin shino with 25% clay and porcelain shi=
no
> with 17%.
>
> If for any reason the link above doesn't work, just Google my name to get
> to
> my website, click "syllabi and handouts," click "handouts and information=
,"
> and click "ACC Stock Glazes" in the center column.
> - Vince
>
> Vince Pitelka
> Appalachian Center for Craft
> Tennessee Tech University
> vpitelka@dtccom.net
> http://iweb.tntech.edu/wpitelka/
>
>
>
>


--
Regards,

John

johnbrittpottery@gmail.com
http://ncclayclub.blogspot.com
www.johnbrittpottery.com

Ben Morrison on sun 5 feb 12


I don't think it's just one chemical, but the combination of chemicals. Any=
=3D
one of the chemicals in a shino can be put over a glaze by itself right? I=
=3D
've had success even putting some slips over another glaze in a thin layer,=
=3D
such as a titanium soda slip. The soda ash however melts out at about 1563=
=3D
F. By itself it would cause another glaze to run and flow at lower tempera=
=3D
tures. However in conjunction with the clay and other feldspars like the lo=
=3D
w melting Nepheline Syenite, it begins to flux and makes a gooey coating of=
=3D
shino at low temperatures. Then the glaze underneath begins to melt later,=
=3D
gassing off under the semi-melted shino. If you've ever tried, most shino =
=3D
glazes are at least partially melted at cone 1. So the mixture of the mater=
=3D
ials is the problem, not any one chemical.=3DA0=3D0A=3D0A-Ben=3D0A=3D0A____=
__________=3D
__________________=3D0A From: Vince Pitelka =3D0ATo: C=
laya=3D
rt@LSV.CERAMICS.ORG =3D0ASent: Saturday, February 4, 2012 7:43 PM=3D0ASubje=
ct: =3D
Re: shino over under=3D0A =3D0AI wrote:=3D0A"If you put any glaze under a s=
hino c=3D
ontaining soda ash, it will bubble and=3D0Afroth and ruin the pot."=3D0A=3D=
0AJohn=3D
Britt wrote;=3D0A"This is incorrect. It is not the soda ash that is the cu=
lp=3D
rit, it is the=3D0Aclay percentage."=3D0A=3D0AHi John.=3DA0 Could you expla=
in the m=3D
echanics of this? Why is it that other=3D0Aglazes we have containing as muc=
h =3D
clay never cause this problem. We have two=3D0Ashinos among our stock cone =
10=3D
glazes, and both cause this problem if you=3D0Aput any other glaze under t=
he=3D
m.=3DA0 We have a number of other glazes that=3D0Acontain just as much clay=
tha=3D
t never cause this problem.=3DA0 The difference=3D0Aseems to be the soda as=
h.=3D
=3D0A- Vince

L TURNER on sun 5 feb 12


Vince, John, et.al.

"Why do shino glazes usually not work well over other glazes"?

A very simplified answer:

Most american shino glaze recipes result in a very stiff melt, even at
high cone temperatures. It is a function of the high aluminium
content of the melt. (see: chapters 8 & 9 in "Silicate Glasses and
Melts - Properties and Structure" by B. O. Mysen & P. Richet for a
non-simplified discussion.)

Combine this with the generally "gassy" recipes for all the "other"
glazes and the scene is set for conflict.

L. Turner

John Britt on mon 6 feb 12


Vince,

As always, I am a lover of scientific inquiry. Problem here is was have a=
=3D
lot of=3D20
variables. So we don't know the thickness, the firings cycle, amounts of =
=3D
soda=3D20
ash, etc. And it may sound like it makes sense but may have a reason it=3D2=
0=3D

doesn't.

Tests I have done with shinos (leaving out the soda ash) indicate that it=
=3D
is the=3D20
clay. (I could be wrong.) But the only tests necessary would be to have a=
=3D
=3D20
control (shino ) and then add soda ash in increments. Then over and under=
=3D
=3D20
glazes.

Or taking a shino (70% nepheline Syenite /30% clay ) and drop out the cla=
=3D
y=3D20
and add it back in 5% increments. Putting those over and under glazes. T=
=3D
hen=3D20
putting it over and under with a set amount of soda ash (say 8% as a medi=
=3D
um=3D20
amount).

You could try adding soda ash to copper reds (very low clay glazes -whic=
=3D
h I=3D20
have done) and see if this cause bubbles because it seals over early.=3D20

One reason I concluded that clay was the culprit, this is that I did a se=
=3D
ries of=3D20
test recently with 80 shinos. I put them over and under each other in var=
=3D
ying=3D20
thickness and in various firing cycles and the ones that cratered were=3D20=
=3D

consistently the high clay recipes. Soda ash variation did not seem to ma=
=3D
tter.

Gotta run, but if I can do some tests I will.

John Britt

Hank Murrow on mon 6 feb 12


On Feb 5, 2012, at 5:00 PM, Vince Pitelka wrote:

> I don't have any pictures of the problem, but it is easy to describe. =
=3D
It is
> just a very crusty surface of very small bubbles wherever the other =3D
glaze is
> under the shino. think we have the answer from the contributions of =3D
others.
> It makes sense that a soda-ash-containing shino seals over at a much =3D
lower
> temperature than other glazes, and yet it contains a lot of clay and
> maintains its viscosity. So glazes underneath releasing volatiles =3D
tend to
> make the shino bubble, and since it is a stiff glaze it preserves =3D
those
> bubbles. Shinos with no soda ash like Hank's shinos don't tend to do =3D
this.
> Does this make sense?

Sounds good to me; but I won't be adding any soda ash to my Shino to =3D
test the theory.=3D20
Following my motto, "I don't use no stinkin' sody ash!", I opt to remain =
=3D
pure, Vince!

Cheers, Hank=3D

John Britt on mon 6 feb 12


Another good test could be several shinos with and without soda ash and t=
=3D
hen dip=3D20
in various thickness of terra sig (100 % clay). Thin/medium/thick.

John Britt

Elizabeth Willoughby on mon 6 feb 12


Thank you for posting those images Michael. They are stunning examples of
shinos over glazes. . . you have had much better luck than I have with
layering. When you apply the slips, are they on greenware, and then
bisqued before glazing?
Liz Willoughby
Brighton, Ontario, Canada

On Mon, Feb 6, 2012 at 6:37 PM, wrote:

> I've been working with shino type glazes over other glazes for quite some
> time now. I think John is on to something when he mentions the clay conte=
nt
> of the shino and the glaze it's going over. I've found that the highly
> viscous shino likes to be over low viscosity glazes, like tenmoku. The
> "stiffer" shino tends to float around on the low clay content glaze below=
.
> Think of the concept of continental Drift. One thing I've discovered that
> can really cause the "Shino Curse" is the iron content of the clay body.
> Shino over Tenmoku on a high iron content clay is a disaster with bubbles
> and blisters that won't heal no matter how many time the piece is re-fire=
d.
> Buff to white stoneware and porcelain work best.
>
>
> I've posted several images of my shino over pieces on my blog at the
> following link:
>
> http://dmichaelcoffee.wordpress.com/2012/02/06/shino-over/
>
>
>
> Michael
>
>
> http://www.dmcarts.com
>
>

Ben Morrison on mon 6 feb 12


Nepheline Syenite begins a weak melt at cone 1. That mixed with clay alone =
=3D
would make a sticky good on the outside of a pot that would stop later off =
=3D
gassing of a K feldspar base glaze.=3D0A=3D0A=3D0A_________________________=
______=3D
_=3D0A From: John Britt =3D0ATo: Clayart@LSV.CE=
RAMI=3D
CS.ORG =3D0ASent: Monday, February 6, 2012 5:48 AM=3D0ASubject: Re: shino o=
ver =3D
under=3D0A =3D0AVince,=3D0A=3D0AAs always, I am a lover of scientific inqui=
ry. Prob=3D
lem here is was have a lot of =3D0Avariables. So we don't know the thicknes=
s,=3D
the firings cycle, amounts of soda =3D0Aash, etc. And it may sound like it=
m=3D
akes sense but may have a reason it =3D0Adoesn't.=3D0A=3D0ATests I have don=
e with=3D
shinos (leaving out the soda ash) indicate that it is the =3D0Aclay. (I co=
ul=3D
d be wrong.) But the only tests necessary would be to have a =3D0Acontrol (=
sh=3D
ino ) and then add soda ash in increments. Then over and under =3D0Aglazes.=
=3D
=3D0A=3D0AOr taking a shino (70% nepheline Syenite /30% clay ) and drop out=
the=3D
clay =3D0Aand add it back in 5% increments. Putting those over and under g=
la=3D
zes.=3DA0 Then =3D0Aputting it over and under with a set amount of soda ash=
(sa=3D
y 8% as a medium =3D0Aamount).=3D0A=3D0AYou could try adding soda ash to co=
pper r=3D
eds=3DA0 (very low clay glazes -which I =3D0Ahave done) and see if this cau=
se b=3D
ubbles because it seals over early. =3D0A=3D0AOne reason I concluded that c=
lay =3D
was the culprit, this is that I did a series of =3D0Atest recently with 80 =
sh=3D
inos. I put them over and under each other in varying =3D0Athickness and in=
v=3D
arious firing cycles and the ones that cratered were =3D0Aconsistently the =
hi=3D
gh clay recipes. Soda ash variation did not seem to matter.=3D0A=3D0AGotta =
run,=3D
but if I can do some tests I will.=3D0A=3D0AJohn Britt

VeenaRaghavan@CS.COM on mon 6 feb 12


Hi Michael,

I have been following this thread with great interest. Thank you so much
for sharing your results of Shino over glazes or Alberta Slip. They are ver=
y
lovely and very interesting. I have been using Albany Slip over Malcolm
Davis' Shino with Soda Ash, which often gives a gold look. Now, I must try =
it
under the Shino to see what happens!

Thank you for the inspiration.

Veena

In a message dated 2/6/2012 7:22:22 PM Eastern Standard Time,
dmcarts2u@AOL.COM writes:
>
> I've been working with shino type glazes over other glazes for quite some
> time now. I think John is on to something when he mentions the clay conte=
nt
> of the shino and the glaze it's going over. I've found that the highly
> viscous shino likes to be over low viscosity glazes, like tenmoku. The
> "stiffer" shino tends to float around on the low clay content glaze below=
. Think
> of the concept of continental Drift. One thing I've discovered that can
> really cause the "Shino Curse" is the iron content of the clay body. Shin=
o over
> Tenmoku on a high iron content clay is a disaster with bubbles and
> blisters that won't heal no matter how many time the piece is re-fired. B=
uff to
> white stoneware and porcelain work best.
>
>
> I've posted several images of my shino over pieces on my blog at the
> following link:
>
> http://dmichaelcoffee.wordpress.com/2012/02/06/shino-over/
>
>

VeenaRaghavan@cs.com

dmcarts2u@AOL.COM on mon 6 feb 12


I've been working with shino type glazes over other glazes for quite some t=
=3D
ime now. I think John is on to something when he mentions the clay content =
=3D
of the shino and the glaze it's going over. I've found that the highly visc=
=3D
ous shino likes to be over low viscosity glazes, like tenmoku. The "stiffer=
=3D
" shino tends to float around on the low clay content glaze below. Think of=
=3D
the concept of continental Drift. One thing I've discovered that can reall=
=3D
y cause the "Shino Curse" is the iron content of the clay body. Shino over =
=3D
Tenmoku on a high iron content clay is a disaster with bubbles and blisters=
=3D
that won't heal no matter how many time the piece is re-fired. Buff to whi=
=3D
te stoneware and porcelain work best. =3D20


I've posted several images of my shino over pieces on my blog at the follow=
=3D
ing link:

http://dmichaelcoffee.wordpress.com/2012/02/06/shino-over/



Michael


http://www.dmcarts.com


-----Original Message-----
From: Vince Pitelka
To: Clayart
Sent: Mon, Feb 6, 2012 6:14 am
Subject: Re: shino over under


I don't have any pictures of the problem, but it is easy to describe. It i=
=3D
s
just a very crusty surface of very small bubbles wherever the other glaze i=
=3D
s
under the shino. think we have the answer from the contributions of others=
=3D
.
It makes sense that a soda-ash-containing shino seals over at a much lower
temperature than other glazes, and yet it contains a lot of clay and
maintains its viscosity. So glazes underneath releasing volatiles tend to
make the shino bubble, and since it is a stiff glaze it preserves those
bubbles. Shinos with no soda ash like Hank's shinos don't tend to do this.
Does this make sense?
- Vince

Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net
http://iweb.tntech.edu/wpitelka/

=3D20

Eva Gallagher on tue 7 feb 12


Wow! Stunning examples. Our Johnston temmoku however blisters :( - even if
overlapped just a tiny bit - blisters. We did find that blisters were worse
on brown clay than on white - perhaps again some off gassing from the clay
body as well as from glaze ingredients.
I did get some great results with with a vitreous blue slip used
underneath - actually more like a glaze even at cone 6 - and it gives smoot=
h
craters under the shino - gives appearance of various sizes of circles. You
can see the effect best on the fourth picture down on this link -
http://newfoundoutpotter.blogspot.com/

Eva Gallagher
Deep River, Ontario
http://newfoundoutpotter.blogspot.com/
----- Original Message -----
From:
To: Sent: Monday, February 06, 2012 6:37 PM
Subject: Re: shino over under


I've been working with shino type glazes over other glazes for quite some
time now. I think John is on to something when he mentions the clay content
of the shino and the glaze it's going over. I've found that the highly
viscous shino likes to be over low viscosity glazes, like tenmoku. The
"stiffer" shino tends to float around on the low clay content glaze below.
Think of the concept of continental Drift. One thing I've discovered that
can really cause the "Shino Curse" is the iron content of the clay body.
Shino over Tenmoku on a high iron content clay is a disaster with bubbles
and blisters that won't heal no matter how many time the piece is re-fired.
Buff to white stoneware and porcelain work best.


I've posted several images of my shino over pieces on my blog at the
following link:

http://dmichaelcoffee.wordpress.com/2012/02/06/shino-over/



Michael


http://www.dmcarts.com


-----Original Message-----
From: Vince Pitelka
To: Clayart
Sent: Mon, Feb 6, 2012 6:14 am
Subject: Re: shino over under


I don't have any pictures of the problem, but it is easy to describe. It i=
s
just a very crusty surface of very small bubbles wherever the other glaze i=
s
under the shino. think we have the answer from the contributions of others=
.
It makes sense that a soda-ash-containing shino seals over at a much lower
temperature than other glazes, and yet it contains a lot of clay and
maintains its viscosity. So glazes underneath releasing volatiles tend to
make the shino bubble, and since it is a stiff glaze it preserves those
bubbles. Shinos with no soda ash like Hank's shinos don't tend to do this.
Does this make sense?
- Vince

Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net
http://iweb.tntech.edu/wpitelka/

John Hesselberth on wed 8 feb 12


Hi Everyone,

I've been following this discussion with interest. Though I know next to =
=3D
nothing about shinos, I have studied glaze layering a fair amount.=3D20

My observations are that when you layer any two different glazes you are =
=3D
almost always increasing the number and type of fluxing materials at the =
=3D
interface between the two glazes. This happens simply because the two =3D
glazes are different in composition and at the interface some =3D
intermingling will occur. This can and usually does change the melting =3D
and off-gassing physics and chemistry in rather unpredictable ways. =3D
Melting usually occurs at a lower temperature so you tend to get more =3D
running, though not always.=3D20

With respect to off-gassing, sometimes it works; sometimes it doesn't. =3D
Although I have seen various "rules of thumb" about how to make layering =
=3D
work I have not been able to come up with a universal "rule". I think =3D
the chemistry of gas evolution in a glaze is too complex for universal =3D
rules. It seems to be one of those "try it and see if it works" =3D
situations.

Regards,

John


John Hesselberth
john@frogpondpottery.com

"American football combines the two worst aspects of American culture -- =
=3D
violence and committee meetings." George Will

John Britt on sat 11 feb 12


Here is an images and Show of Chawan's :

http://ncclayclub.blogspot.com/2012/02/shino-first-or-pot-is-cursed.html

john britt pottery

Randall Moody on sat 11 feb 12


I think that for the majority of people, especially beginners, the general
rule of shino first makes sense. Granted there are always exceptions to
every rule...even the rule that there are always exceptions to every rule.

--
Randall in Atlanta
http://wrandallmoody.com

Steve Mills on sun 12 feb 12


On 11 Feb 2012, at 19:47, Randall Moody wrote:

> I think that for the majority of people, especially beginners, the genera=
l=3D

> rule of shino first makes sense. Granted there are always exceptions to
> every rule...even the rule that there are always exceptions to every rule=
.=3D

>=3D20
> --
> Randall in Atlanta
> http://wrandallmoody.com

Or as George Bernard Shaw put it: "The Golden Rule is....There is NO Golden=
R=3D
ule!"

Steve M

Steve Mills
Bath
UK
www.mudslinger.me.uk
Sent from my iPod=3D

Ben Morrison on sun 12 feb 12


That's an all too familiar sight. Outside of the one White Shino at Mount H=
ood Community College over the Tenmoku this is the result I got from puttin=
g shino on top of a glaze. It's possible that it wasn't even an American Sh=
ino, but a Japanese Shino. I'll have to see if I can dig out that recipe so=
me how or another.

-Ben


________________________________
From: John Britt
To: Clayart@LSV.CERAMICS.ORG
Sent: Saturday, February 11, 2012 8:56 AM
Subject: Re: shino over under

Here is an images and Show of Chawan's :

http://ncclayclub.blogspot.com/2012/02/shino-first-or-pot-is-cursed.html

john britt pottery