Tetsuya Shimano on sat 8 jan 00
hi!
it's me again. i have a recipe of a traditional japanese glaze from my home
town. it's called "Ao Namako" glaze. this glaze is like rutile blue, but
much thicker than regular rutile blue and it's also runny. usually, this
glaze has to be applied inside of pots and rims only. not outside! that's
the tradtional way! it runs a lot! the clay body has to be dark
brown/black clay... anyway, i tried to make this glaze, but i couldn't get
strow ash. it has to be rice strow ash. i know it's hard to get in u. s.,
even in canada. also it is hard to get wood ash here in the metro area. do
u think that it's possible to make synthetic strow ash and wood ash?
Naraoka Ao Namako Glaze cone 10 reduction
Custer Feldspar 20.00
Strow Ash 60.00
Wood Ash 20.00
Add:
Red Iron Oxide 2.00%
Cobalt Oxide 1.00%
Manganese Dioxide 2.00%
t
Percy Toms on sun 9 jan 00
>anyway, i tried to make this glaze, but i couldn't get
>strow ash. it has to be rice strow ash.
I dont know about rice straw _ash_, but if you're interested, farmers here
around Chico, California (100 miles north of Sacramento) have plenty bales of
rice straw they can't give away fast enough.
Ned
CNW on sun 9 jan 00
Tetsuya- I don't know where you live but rice is grown in the U.S. also.
Here is an e-mail address for a large group of rice growers:
riceland@riceland.com .
I think they might give you some addresses of growers they might be able to
help.
I think that a while back some one posted a list of ingerdiants for a straw
ash substitute. I culdn't come up with it in the archives. I saved it a
while then lost it to computer problems. Maybe you will be better at finding
it in the archives than I am.
Celia in NC
cwike@conninc.com
Wade Blocker on sun 9 jan 00
----------
> From: Tetsuya Shimano
> To: CLAYART@LSV.UKY.EDU
> Subject: synthetic strow ash and wood ash
> Date: Saturday, January 08, 2000 12:14 PM
>
> ----------------------------Original message----------------------------
> hi!
>
> it's me again. i have a recipe of a traditional japanese glaze from my
home
> town. it's called "Ao Namako" glaze. this glaze is like rutile blue,
but
> much thicker than regular rutile blue and it's also runny. usually, this
> glaze has to be applied inside of pots and rims only. not outside!
that's
> the tradtional way! it runs a lot! the clay body has to be dark
> brown/black clay... anyway, i tried to make this glaze, but i couldn't
get
> strow ash. it has to be rice strow ash. i know it's hard to get in u.
s.,
> even in canada. also it is hard to get wood ash here in the metro area.
do
> u think that it's possible to make synthetic strow ash and wood ash?
>
> Naraoka Ao Namako Glaze cone 10 reduction
>
> Custer Feldspar 20.00
> Strow Ash 60.00
> Wood Ash 20.00
>
> Add:
> Red Iron Oxide 2.00%
> Cobalt Oxide 1.00%
> Manganese Dioxide 2.00%
>
> t
Tetsuya, Leslie ceramics supply company in Berkeley, California used to
carry rice straw ash from Japan. It is worth contacting them to find out if
they still carry it.Their phone number is 510 524 7363. Their e-mail
address is :questions@leslieceramics.com Mia in ABQ
John K Dellow on sun 9 jan 00
Herbert H. Sanders in his "The World of Japanese Ceramics " gives
the following American equivalent
for A Namako Glaze.
Cone 9-10 R
Eureka feldspar 68.30
soda ash 0.12
whiting 22.25
magnesite 0.25 ( a black form of iron oxide )
redstone clay 7.76 ( i.e. terra-cotta clay )
Al2O3 1.42
Titanium dioxide 9.00
manganese dioxide 9.00
Remember if you are going to run this through a calculation
program you will need to know the analysis of Eureka spar from
the time of the testing. The book was first published in 1967
,but the calculations were done in the Kyoto Research Institute
some tome before that .
Tetsuya Shimano wrote:
>
> ----------------------------Original message----------------------------
> hi!
>
> it's me again. i have a recipe of a traditional japanese glaze from my home
> town. it's called "Ao Namako" glaze. this glaze is like rutile blue, but
> much thicker than regular rutile blue and it's also runny. usually, this
> glaze has to be applied inside of pots and rims only. not outside! that's
> the tradtional way! it runs a lot! the clay body has to be dark
> brown/black clay... anyway, i tried to make this glaze, but i couldn't get
> strow ash. it has to be rice strow ash. i know it's hard to get in u. s.,
> even in canada. also it is hard to get wood ash here in the metro area. do
> u think that it's possible to make synthetic strow ash and wood ash?
>
> Naraoka Ao Namako Glaze cone 10 reduction
>
> Custer Feldspar 20.00
> Strow Ash 60.00
> Wood Ash 20.00
>
> Add:
> Red Iron Oxide 2.00%
> Cobalt Oxide 1.00%
> Manganese Dioxide 2.00%
>
> t
--
John Dellow "the flower pot man"
Home Page http://www.welcome.to/jkdellow
http://digitalfire.com/education/people/dellow/
Kent / Pat on sun 9 jan 00
Tetsuya,
Where do you live? I'm here in the Denver CO metro area. We can find
fireplace ash just about any time. Does it make a difference if it is
hardwood or softwood Ash? The stuff here in Colorado would probably be
softwood.
Pat Porter
Aurora Co pporter@4dv.net
----- Original Message -----
From: "Tetsuya Shimano"
To:
Sent: Saturday, January 08, 2000 11:14 AM
Subject: synthetic strow ash and wood ash
> ----------------------------Original message----------------------------
> hi!
>
> it's me again. i have a recipe of a traditional japanese glaze from my
home
> town. it's called "Ao Namako" glaze. this glaze is like rutile blue, but
> much thicker than regular rutile blue and it's also runny. usually, this
> glaze has to be applied inside of pots and rims only. not outside!
that's
> the tradtional way! it runs a lot! the clay body has to be dark
> brown/black clay... anyway, i tried to make this glaze, but i couldn't
get
> strow ash. it has to be rice strow ash. i know it's hard to get in u.
s.,
> even in canada. also it is hard to get wood ash here in the metro area.
do
> u think that it's possible to make synthetic strow ash and wood ash?
>
> Naraoka Ao Namako Glaze cone 10 reduction
>
> Custer Feldspar 20.00
> Strow Ash 60.00
> Wood Ash 20.00
>
> Add:
> Red Iron Oxide 2.00%
> Cobalt Oxide 1.00%
> Manganese Dioxide 2.00%
>
> t
Emily & Kurt Kiewel on mon 10 jan 00
Here is a recipe for synthetic rice straw ash out of "Inside Japanese
Ceramics" by Richard Wilson.
Potash feldspar 22.2
limestone 5.8
silica 72.0
Wilson states that the formula is from the book "Togei no Yuyaku" by Onishi
Masataro.
Hope it works-Emily
Michael Banks on mon 10 jan 00
John,
Magnesite is actually the mineral name for magnesium carbonate. Black
magnetic oxide is magnetite.
Michael Banks,
Nelson,
New Zealand
John K Dellow wrote:
> ----------------------------Original message----------------------------
> Herbert H. Sanders in his "The World of Japanese Ceramics " gives
> the following American equivalent
> for A Namako Glaze.
>
> Cone 9-10 R
>
> Eureka feldspar 68.30
> soda ash 0.12
> whiting 22.25
> magnesite 0.25 ( a black form of iron oxide )
> redstone clay 7.76 ( i.e. terra-cotta clay )
> Al2O3 1.42
> Titanium dioxide 9.00
> manganese dioxide 9.00
>
> Remember if you are going to run this through a calculation
> program you will need to know the analysis of Eureka spar from
> the time of the testing. The book was first published in 1967
> ,but the calculations were done in the Kyoto Research Institute
> some tome before that .
> Tetsuya Shimano wrote:
> >
> > ----------------------------Original message----------------------------
> > hi!
> >
> > it's me again. i have a recipe of a traditional japanese glaze from my
home
> > town. it's called "Ao Namako" glaze. this glaze is like rutile blue,
but
> > much thicker than regular rutile blue and it's also runny. usually,
this
> > glaze has to be applied inside of pots and rims only. not outside!
that's
> > the tradtional way! it runs a lot! the clay body has to be dark
> > brown/black clay... anyway, i tried to make this glaze, but i couldn't
get
> > strow ash. it has to be rice strow ash. i know it's hard to get in u.
s.,
> > even in canada. also it is hard to get wood ash here in the metro area.
do
> > u think that it's possible to make synthetic strow ash and wood ash?
> >
> > Naraoka Ao Namako Glaze cone 10 reduction
> >
> > Custer Feldspar 20.00
> > Strow Ash 60.00
> > Wood Ash 20.00
> >
> > Add:
> > Red Iron Oxide 2.00%
> > Cobalt Oxide 1.00%
> > Manganese Dioxide 2.00%
> >
> > t
>
> --
>
> John Dellow "the flower pot man"
> Home Page http://www.welcome.to/jkdellow
> http://digitalfire.com/education/people/dellow/
>
John K Dellow on tue 11 jan 00
Thanks for picking me up on that Michael . Looks like I have a
wrong name on a small sample of magnetite and i used it in the
test of the recipe I posted . It did come out as expected :) .
John
Michael Banks wrote:
>
> ----------------------------Original message----------------------------
> John,
>
> Magnesite is actually the mineral name for magnesium carbonate. Black
> magnetic oxide is magnetite.
>
> Michael Banks,
> Nelson,
> New Zealand
>
> John K Dellow wrote:
> > ----------------------------Original message----------------------------
> > Herbert H. Sanders in his "The World of Japanese Ceramics " gives
> > the following American equivalent
> > for A Namako Glaze.
> >
> > Cone 9-10 R
> >
> > Eureka feldspar 68.30
> > soda ash 0.12
> > whiting 22.25
> > magnesite 0.25 ( a black form of iron oxide )
> > redstone clay 7.76 ( i.e. terra-cotta clay )
> > Al2O3 1.42
> > Titanium dioxide 9.00
> > manganese dioxide 9.00
> >
> > Remember if you are going to run this through a calculation
> > program you will need to know the analysis of Eureka spar from
> > the time of the testing. The book was first published in 1967
> > ,but the calculations were done in the Kyoto Research Institute
> > some tome before that .
> > Tetsuya Shimano wrote:
> > >
> > > ----------------------------Original message----------------------------
> > > hi!
> > >
> > > it's me again. i have a recipe of a traditional japanese glaze from my
> home
> > > town. it's called "Ao Namako" glaze. this glaze is like rutile blue,
> but
> > > much thicker than regular rutile blue and it's also runny. usually,
> this
> > > glaze has to be applied inside of pots and rims only. not outside!
> that's
> > > the tradtional way! it runs a lot! the clay body has to be dark
> > > brown/black clay... anyway, i tried to make this glaze, but i couldn't
> get
> > > strow ash. it has to be rice strow ash. i know it's hard to get in u.
> s.,
> > > even in canada. also it is hard to get wood ash here in the metro area.
> do
> > > u think that it's possible to make synthetic strow ash and wood ash?
> > >
> > > Naraoka Ao Namako Glaze cone 10 reduction
> > >
> > > Custer Feldspar 20.00
> > > Strow Ash 60.00
> > > Wood Ash 20.00
> > >
> > > Add:
> > > Red Iron Oxide 2.00%
> > > Cobalt Oxide 1.00%
> > > Manganese Dioxide 2.00%
> > >
> > > t
> >
> > --
> >
> > John Dellow "the flower pot man"
> > Home Page http://www.welcome.to/jkdellow
> > http://digitalfire.com/education/people/dellow/
> >
--
John Dellow "the flower pot man"
Home Page http://www.welcome.to/jkdellow
http://digitalfire.com/education/people/dellow/
Helen Bates on tue 11 jan 00
I noticed this -
Ash Glazes
Robert Tichane / Paperback / Published 1998
(Amazon.com Price: $19.96)
- in our 'Chapters' bookstore. It is also available through Amazon.com. There
is a discussion of rice straw and why it would give different results than, say,
oat straw. (Grows in water; has more silicon for this reason)
I wonder what other water-growing plants, like wild rice, various rushes, and
cattail plants would be like, as they also grow in water. Cattails are very
silicaceous, I think. I believe they were used as pot scrubbers historically.
Enjoying clayart.
From: 'a rank amateur'
Helen Bates
Hank Murrow on wed 12 jan 00
>----------------------------Original message----------------------------
>I noticed this -
> Ash Glazes
> Robert Tichane / Paperback / Published 1998
> (Amazon.com Price: $19.96)
>
>- in our 'Chapters' bookstore. It is also available through Amazon.com.
>There
>is a discussion of rice straw and why it would give different results
>than, say,
>oat straw. (Grows in water; has more silicon for this reason)
>
>I wonder what other water-growing plants, like wild rice, various rushes, and
>cattail plants would be like, as they also grow in water. Cattails are very
>silicaceous, I think. I believe they were used as pot scrubbers historically.
>
>Enjoying clayart.
>
>From: 'a rank amateur'
>
>Helen Bates
Dear Helen; Wonderful post! I attended a Hamada Shoji workshop at USC in
Los Angeles in the early sixties. He said you can 'tell' the content of the
ash by carefully regarding what functionit performs. Thus, rice hull
ash(protects the seed) is more silaceous than rice straw(carries the seed)
ash. Both are more silaceous than rice seed(carries the reproductive
capability) ash. At the time, I was twentyone and thought this stuff most
mysterious(encouraged by secretive claybuds); but Hamada's remark opened my
understanding while allowing me to retain the sense of mystery. A very
generous man and claybud. Since then for example, I have used apple pulp
ash( the pulp is available by the ton from any cider producer) to make
wonderful High Phosphorus glazes(fruits are high in P2O5).
Hank in Eugene
Edouard Bastarache on wed 12 jan 00
------------------
Hello all,
for those interested here is an analysis of Calcined Rice Hull as sold to
steel mills in our region by Uncle Ben's:
SiO2 96.89
Al2O3 1.01
Fe2O3 .04
P2O5 .02
TiO2 .16
CaO .48
MgO .22
K2O .91
Na2O .26
Later,
Edouard Bastarache
edouardb=40sorel-tracy.qc.ca
http://www.sorel-tracy.qc.ca/=7Eedouardb/
-----Message d'origine-----
De : John K Dellow =3Cdellowjk=40kewl.com.au=3E
=C0 : CLAYART=40LSV.UKY.EDU =3CCLAYART=40LSV.UKY.EDU=3E
Date : 11 janvier, 2000 10:57
Objet : Re: synthetic strow ash and wood ash
=3E----------------------------Original message----------------------------
=3EThanks for picking me up on that Michael . Looks like I have a
=3Ewrong name on a small sample of magnetite and i used it in the
=3Etest of the recipe I posted . It did come out as expected :) .
=3EJohn
=3E
=3EMichael Banks wrote:
=3E=3E
=3E=3E ----------------------------Original =
message----------------------------
=3E=3E John,
=3E=3E
=3E=3E Magnesite is actually the mineral name for magnesium carbonate. =
Black
=3E=3E magnetic oxide is magnetite.
=3E=3E
=3E=3E Michael Banks,
=3E=3E Nelson,
=3E=3E New Zealand
=3E=3E
=3E=3E John K Dellow wrote:
=3E=3E =3E ----------------------------Original
message----------------------------
=3E=3E =3E Herbert H. Sanders in his =22The World of Japanese Ceramics =22 =
gives
=3E=3E =3E the following American equivalent
=3E=3E =3E for A Namako Glaze.
=3E=3E =3E
=3E=3E =3E Cone 9-10 R
=3E=3E =3E
=3E=3E =3E Eureka feldspar 68.30
=3E=3E =3E soda ash 0.12
=3E=3E =3E whiting 22.25
=3E=3E =3E magnesite 0.25 ( a black form of iron oxide )
=3E=3E =3E redstone clay 7.76 ( i.e. terra-cotta clay )
=3E=3E =3E Al2O3 1.42
=3E=3E =3E Titanium dioxide 9.00
=3E=3E =3E manganese dioxide 9.00
=3E=3E =3E
=3E=3E =3E Remember if you are going to run this through a calculation
=3E=3E =3E program you will need to know the analysis of Eureka spar from
=3E=3E =3E the time of the testing. The book was first published in 1967
=3E=3E =3E ,but the calculations were done in the Kyoto Research Institute
=3E=3E =3E some tome before that .
=3E=3E =3E Tetsuya Shimano wrote:
=3E=3E =3E =3E
=3E=3E =3E =3E ----------------------------Original
message----------------------------
=3E=3E =3E =3E hi=21
=3E=3E =3E =3E
=3E=3E =3E =3E it's me again. i have a recipe of a traditional japanese =
glaze from
my
=3E=3E home
=3E=3E =3E =3E town. it's called =22Ao Namako=22 glaze. this glaze is like=
rutile
blue,
=3E=3E but
=3E=3E =3E =3E much thicker than regular rutile blue and it's also runny. =
usually,
=3E=3E this
=3E=3E =3E =3E glaze has to be applied inside of pots and rims only. not =
outside=21
=3E=3E that's
=3E=3E =3E =3E the tradtional way=21 it runs a lot=21 the clay body has =
to be dark
=3E=3E =3E =3E brown/black clay... anyway, i tried to make this glaze, but =
i
couldn't
=3E=3E get
=3E=3E =3E =3E strow ash. it has to be rice strow ash. i know it's hard to=
get in
u.
=3E=3E s.,
=3E=3E =3E =3E even in canada. also it is hard to get wood ash here in the =
metro
area.
=3E=3E do
=3E=3E =3E =3E u think that it's possible to make synthetic strow ash and =
wood ash?
=3E=3E =3E =3E
=3E=3E =3E =3E Naraoka Ao Namako Glaze cone 10 reduction
=3E=3E =3E =3E
=3E=3E =3E =3E Custer Feldspar 20.00
=3E=3E =3E =3E Strow Ash 60.00
=3E=3E =3E =3E Wood Ash 20.00
=3E=3E =3E =3E
=3E=3E =3E =3E Add:
=3E=3E =3E =3E Red Iron Oxide 2.00=25
=3E=3E =3E =3E Cobalt Oxide 1.00=25
=3E=3E =3E =3E Manganese Dioxide 2.00=25
=3E=3E =3E =3E
=3E=3E =3E =3E t
=3E=3E =3E
=3E=3E =3E --
=3E=3E =3E
=3E=3E =3E John Dellow =22the flower pot man=22
=3E=3E =3E Home Page http://www.welcome.to/jkdellow
=3E=3E =3E http://digitalfire.com/education/people/dellow/
=3E=3E =3E
=3E
=3E--
=3E
=3E John Dellow =22the flower pot man=22
=3EHome Page http://www.welcome.to/jkdellow
=3Ehttp://digitalfire.com/education/people/dellow/
Hank Murrow on thu 13 jan 00
>----------------------------Original message----------------------------
>for those interested here is an analysis of Calcined Rice Hull as sold to
>steel mills in our region by Uncle Ben's:
>
>SiO2 96.89
>Al2O3 1.01
>Fe2O3 .04
>P2O5 .02
>TiO2 .16
>CaO .48
>MgO .22
>K2O .91
>Na2O .26
>
>Later,
>Edouard Bastarache
I attended a Hamada Shoji workshop at USC in Los Angeles in the early
sixties. He said you can 'tell' the content of the ash by carefully
regarding what function it performs. Thus, rice hull ash(protects the seed)
is more silaceous than rice straw(carries the seed) ash. Both are more
silaceous than rice seed(carries the reproductive capability) ash. As you
can see from Edouard's post, rice hull ash is nearly 100% Silica. Talk
about protection! In contrast, rice straw ash runs about 80+% Silica if I
recall correctly. The seed itself is high in K/Na/Ca and Phosphorus. Hank
in Eugene
Veena Raghavan on thu 13 jan 00
Message text written by Ceramic Arts Discussion List
>Since then for example, I have used apple pulp
ash( the pulp is available by the ton from any cider producer) to make
wonderful High Phosphorus glazes(fruits are high in P2O5).
Hank in Eugene<
Hi Hank,
I just love the idea of using apple pulp ash in a glaze! Do you do
this at high fire or mid-fire. I would love to try it. Does it give off the
smell of apples when the kiln is firing, or would that be too much to hope
for? I guess all the apple fragrance is already burnt out. How do you make
the ash from the pulp? Would love to know, if you do not mind sharing this
information.
Thanks in advance.
All the best.
Veena
Veena Raghavan
75124.2520@compuserve.com
Edouard Bastarache on fri 14 jan 00
------------------
Hello Hank,
very interesting post concerning the relation between
function and amounts of silica.
The amount of silica in rice straw ash may vary from 40 to 82.18=25
according to different authors:
1-Cardew: 82.18=25
2-Sanders: 40=25
3-Rogers: 77.68=25
Later,
Edouard Bastarache
Cold in =22La Belle Province=22
edouardb=40sorel-tracy.qc.ca
http://www.sorel-tracy.qc.ca/=7Eedouardb/
-----Message d'origine-----
De : Hank Murrow =3Chmurrow=40efn.org=3E
=C0 : CLAYART=40LSV.UKY.EDU =3CCLAYART=40LSV.UKY.EDU=3E
Date : 13 janvier, 2000 16:37
Objet : Re: synthetic strow ash and wood ash
----------------------------Original message----------------------------
=3E----------------------------Original message----------------------------
=3Efor those interested here is an analysis of Calcined Rice Hull as sold to
=3Esteel mills in our region by Uncle Ben's:
=3E
=3ESiO2 96.89
=3EAl2O3 1.01
=3EFe2O3 .04
=3EP2O5 .02
=3ETiO2 .16
=3ECaO .48
=3EMgO .22
=3EK2O .91
=3ENa2O .26
=3E
=3ELater,
=3EEdouard Bastarache
I attended a Hamada Shoji workshop at USC in Los Angeles in the early
sixties. He said you can 'tell' the content of the ash by carefully
regarding what function it performs. Thus, rice hull ash(protects the seed)
is more silaceous than rice straw(carries the seed) ash. Both are more
silaceous than rice seed(carries the reproductive capability) ash. As you
can see from Edouard's post, rice hull ash is nearly 100=25 Silica. Talk
about protection=21 In contrast, rice straw ash runs about 80+=25 Silica if =
I
recall correctly. The seed itself is high in K/Na/Ca and Phosphorus. Hank
in Eugene
Hank Murrow on fri 14 jan 00
>Hi Hank,
> I just love the idea of using apple pulp ash in a glaze! Do you do
>this at high fire or mid-fire. I would love to try it. Does it give off the
>smell of apples when the kiln is firing, or would that be too much to hope
>for? I guess all the apple fragrance is already burnt out. How do you make
>the ash from the pulp? Would love to know, if you do not mind sharing this
>information.
>Veena
Dear Veena; The pulp will sour up pretty fast, so you should be ready to
burn it to ash as soon as it is collected. We had the Dean of the
Architecture School pretty upset with the smell (incipient cider going
towards puke) in back of the pottery for awhile. We put the pulp in large
bisqued bowls and fired them to bisque temperature. There isn't very much
ash in the bottom of the bowl, but that is how it was done. Took only 10%
or so to produce a Shaner's Red effect in the right recipe. Also could make
nice Chun-like glazes is subbed for the usual wood ash. Alas, no apple
smells. I think phosphorus glazes are best at high temperatures; But since
I only fire at C/10+ Ox & Red, I may be biased. Try some bone ash at your
temp and see if it works. Then go look for other sources of Phosphorus.
Phosphorus is a glass-former (network former) BTW. Good Luck!
Hank in Eugene
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