Charles on mon 22 jan 01
OK folks, I have been having a terrible time developing an ash glaze for =
Cone 6 oxidation. Does anyone have a cone 6 ash glaze, or even a fake =
ash glaze that is working? I am about at wits end!
I am currently using woodash over another glaze, which just happens =
to work perfectly, but I'd like to have a single dip situation and get =
all the lovely runs and rivulets I expect and never seem to get.
Thanks so much!
-Charles
Check out our spring workshops!!
Pottery in Central PA will never be the same!
http://www.thecreativeoasis.com/SP2001%20Workshops/workshop1.html
Cantello Studios on tue 23 jan 01
This came from the ceramic web give it a try. Chris from Chico, the rain has
started and we need it say make some POWER BOYS !!!
Glaze name: Ash Glaze
Cone: 5 - 6
Color:
Testing: Untested
Surface texture:
Firing: Ox. or Red.
Glaze type:
Recipe: Percent Batch
Gerstley Borate 13.60 68.0
Lithium Carbonate 4.50 22.5
Wood Ash 18.20 91.0
Whiting 18.20 91.0
Albany slip 36.40 182.0
Kaolin 9.10 45.5
Totals: 100.00 % 500.0 Gm
Comments:
> ClayArt Listserv recipe <
If you find this glaze useful, please consider submitting it to the
GlazeBase project with full documentation. Use one of the GlazeBase
submission formats available on the CeramicsWeb web page.
Really hot Cone 6 ash glaze
From: Lowell baker on ClayArt
Received: Thu, 16 Feb 1995 08:52:49
Possible Health Hazards:
Wood Ash: caustic-avoid contact with skin or eyes
Unity Formula for Ash Glaze:
0.049 K2O 0.143 Al2O3 0.728 SiO2
0.034 Na2O 0.093 B2O3 0.007 TiO2
0.728 CaO 0.020 Fe2O3 5.1:1 Si:Al Ratio
0.090 MgO 0.007 P2O5
0.099 Li2O
Percentage Analysis:
35.34 % SiO2
11.81 % Al2O3
5.26 % B2O3
3.72 % K2O
1.70 % Na2O
33.00 % CaO
2.91 % MgO
2.43 % Li2O
2.59 % Fe2O3
0.81 % P2O5
0.49 % TiO2
-----Original Message-----
From: Ceramic Arts Discussion List [mailto:CLAYART@LSV.CERAMICS.ORG]On
Behalf Of Charles
Sent: Monday, January 22, 2001 7:38 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Cone 6 Ash Glazes
OK folks, I have been having a terrible time developing an ash glaze for
Cone 6 oxidation. Does anyone have a cone 6 ash glaze, or even a fake ash
glaze that is working? I am about at wits end!
I am currently using woodash over another glaze, which just happens to
work perfectly, but I'd like to have a single dip situation and get all the
lovely runs and rivulets I expect and never seem to get.
Thanks so much!
-Charles
Check out our spring workshops!!
Pottery in Central PA will never be the same!
http://www.thecreativeoasis.com/SP2001%20Workshops/workshop1.html
____________________________________________________________________________
__
Send postings to clayart@lsv.ceramics.org
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settings from http://www.ceramics.org/clayart/
Moderator of the list is Mel Jacobson who may be reached at
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Ruth Ballou on tue 23 jan 01
Charles,
This a recipe that worked for me.....it's been a while since I've fired at
^6. I use primarily oak ash, which I never wash.Your results may vary,
depending on the ash.
2.11 Strontium Carbonate
2.11 Lithium Carbonate
44.21 Unwashed wood ash
13.68 Whiting
22.10 Pot Spar
15.79 Red Art Clay
Ruth
Ababi Sharon on tue 23 jan 01
Hello Charles!
Here are some real ones:
This is my variation to Yellow Ash from Carolina clay. don't feel strange
with my European materials, there will be corrections!
yellow ash
=========
DOLOMITE............ 7.31 7.24%
LITHIUM CARBONATE... 2.09 2.07%
RUTILE.............. 1.18 1.17%
TITANIUM DIOXIDE.... 1.18 1.17%
PINE ASH............ 34.06 33.73% (wood ash)
BARIUM CARBONATE.... 1.50 1.49%
RED CLAY............ 42.58 42.17% ( Red Art?)
SILICA.............. 11.07 10.96%
========
100.98
BaO 0.02* 1.15%w 0.54%m
CaO 0.38* 10.75%w 13.88%m
Li2O 0.06* 0.84%w 2.05%m
MgO 0.21* 4.21%w 7.57%m
K2O 0.24* 11.12%w 8.55%m
Na2O 0.10* 2.99%w 3.49%m
TiO2 0.07 2.74%w 2.49%m
ZrO2 0.00 0.01%w 0.01%m
Al2O3 0.17 8.78%w 6.24%m
P2O5 0.04 3.02%w 1.54%m
SiO2 1.38 41.32%w 49.77%m
Fe2O3 0.05 4.33%w 1.96%m
MnO 0.05 1.89%w 1.93%m
L.O.I. 6.84
Si:Al 7.98
SiB:Al 7.98
Expan 10.49
Above it, you may apply a matte glaze, it will kind of flow around
This is if I remember, from the list of Don Goodrich, not sure
Ash^6 to^9
==========
PINE ASH............ 28.00 28.43%
DOLOMITE............ 10.00 10.15%
BALL CLAY........... 21.00 21.32%
ENGLISH KAOLIN...... 5.00 5.08%
POTASH FELDSPAR NR.. 26.00 26.40%
LITHIUM CARBONATE... 5.00 5.08%
*CMC GUM............. 0.50 0.51%
COPPER OXIDE........ 3.00 3.05%
========
98.50
CaO 0.26* 10.31%w 13.06%m
Li2O 0.10* 2.08%w 4.96%m
MgO 0.46* 12.96%w 22.85%m
K2O 0.12* 7.92%w 5.97%m
Na2O 0.06* 2.55%w 2.92%m
TiO2 0.01 0.33%w 0.29%m
Al2O3 0.12 8.75%w 6.09%m
P2O5 0.03 2.56%w 1.28%m
SiO2 0.81 34.15%w 40.37%m
Fe2O3 0.01 1.36%w 0.60%m
MnO 0.03 1.60%w 1.60%m
Cost/kg 5.95
L.O.I. 15.43
Si:Al 6.63
SiB:Al 6.63
Expan 9.05
Notes:
Unwashed like old copper ware stony very nice
I did not like it very much
The next one, I developed out of other glazes. you can use other coloring
oxides, but should try here. I think works better on buff clay. So is the
yellow ash.
Blue ash with white dots ^6
===========================
COBALT OXIDE........ 1.00 0.96%
ENGLISH KAOLIN...... 42.33 40.70%
RUTILE.............. 3.00 2.88%
PINE ASH............ 40.68 39.11%
QUARTZ.............. 16.99 16.34%
========
104.00
CaO 0.42* 9.79%w 13.17%m
MgO 0.15* 2.46%w 4.61%m
K2O 0.30* 11.57%w 9.27%m
Na2O 0.13* 3.37%w 4.10%m
TiO2 0.09 2.82%w 2.66%m
ZrO2 0.00 0.03%w 0.02%m
Al2O3 0.35 14.69%w 10.87%m
P2O5 0.06 3.50%w 1.86%m
SiO2 1.61 39.95%w 50.18%m
Fe2O3 0.03 1.96%w 0.93%m
MnO 0.07 2.19%w 2.33%m
L.O.I. 7.68
Si:Al 4.62
SiB:Al 4.62
Expan 10.54
This one from ClayArt archives a beautiful glaze!
ash glazes/mark issenberg
http://lsv.ceramics.org/scripts/wa.exe?A2=ind9603&L=CLAYART&P=R7736
Just don't burn the whole wood!
Ababi Sharon
ababisharon@hotmail.com
http://www.milkywayceramics.com/cgallery/asharon.htm
http://www.israelceramics.org/index.html
* * * * * * * *
www.photoisland.com
ID: sharon@shoval.org.il
Password:clay
Hello Charles!
Here are some real ones:
This is my variation to Yellow Ash from Carolina clay. don't feel strange
with my European materials, there will be corrections!
yellow ash
=========
DOLOMITE............ 7.31 7.24%
LITHIUM CARBONATE... 2.09 2.07%
RUTILE.............. 1.18 1.17%
TITANIUM DIOXIDE.... 1.18 1.17%
PINE ASH............ 34.06 33.73% (wood ash)
BARIUM CARBONATE.... 1.50 1.49%
RED CLAY............ 42.58 42.17% ( Red Art?)
SILICA.............. 11.07 10.96%
========
100.98
BaO 0.02* 1.15%w 0.54%m
CaO 0.38* 10.75%w 13.88%m
Li2O 0.06* 0.84%w 2.05%m
MgO 0.21* 4.21%w 7.57%m
K2O 0.24* 11.12%w 8.55%m
Na2O 0.10* 2.99%w 3.49%m
TiO2 0.07 2.74%w 2.49%m
ZrO2 0.00 0.01%w 0.01%m
Al2O3 0.17 8.78%w 6.24%m
P2O5 0.04 3.02%w 1.54%m
SiO2 1.38 41.32%w 49.77%m
Fe2O3 0.05 4.33%w 1.96%m
MnO 0.05 1.89%w 1.93%m
L.O.I. 6.84
Si:Al 7.98
SiB:Al 7.98
Expan 10.49
Above it, you may apply a matte glaze, it will kind of flow around
This is if I remember, from the list of Don Goodrich, not sure
Ash^6 to^9
==========
PINE ASH............ 28.00 28.43%
DOLOMITE............ 10.00 10.15%
BALL CLAY........... 21.00 21.32%
ENGLISH KAOLIN...... 5.00 5.08%
POTASH FELDSPAR NR.. 26.00 26.40%
LITHIUM CARBONATE... 5.00 5.08%
*CMC GUM............. 0.50 0.51%
COPPER OXIDE........ 3.00 3.05%
========
98.50
CaO 0.26* 10.31%w 13.06%m
Li2O 0.10* 2.08%w 4.96%m
MgO 0.46* 12.96%w 22.85%m
K2O 0.12* 7.92%w 5.97%m
Na2O 0.06* 2.55%w 2.92%m
TiO2 0.01 0.33%w 0.29%m
Al2O3 0.12 8.75%w 6.09%m
P2O5 0.03 2.56%w 1.28%m
SiO2 0.81 34.15%w 40.37%m
Fe2O3 0.01 1.36%w 0.60%m
MnO 0.03 1.60%w 1.60%m
Cost/kg 5.95
L.O.I. 15.43
Si:Al 6.63
SiB:Al 6.63
Expan 9.05
Notes:
Unwashed like old copper ware stony very nice
I did not like it very much
The next one, I developed out of other glazes. you can use other coloring
oxides, but should try here. I think works better on buff clay. So is the
yellow ash.
Blue ash with white dots ^6
===========================
COBALT OXIDE........ 1.00 0.96%
ENGLISH KAOLIN...... 42.33 40.70%
RUTILE.............. 3.00 2.88%
PINE ASH............ 40.68 39.11%
QUARTZ.............. 16.99 16.34%
========
104.00
CaO 0.42* 9.79%w 13.17%m
MgO 0.15* 2.46%w 4.61%m
K2O 0.30* 11.57%w 9.27%m
Na2O 0.13* 3.37%w 4.10%m
TiO2 0.09 2.82%w 2.66%m
ZrO2 0.00 0.03%w 0.02%m
Al2O3 0.35 14.69%w 10.87%m
P2O5 0.06 3.50%w 1.86%m
SiO2 1.61 39.95%w 50.18%m
Fe2O3 0.03 1.96%w 0.93%m
MnO 0.07 2.19%w 2.33%m
L.O.I. 7.68
Si:Al 4.62
SiB:Al 4.62
Expan 10.54
This one from ClayArt archives a beautiful glaze!
ash glazes/mark issenberg
http://lsv.ceramics.org/scripts/wa.exe?A2=ind9603&L=CLAYART&P=R7736
Just don't burn the whole wood!
Ababi Sharon
ababisharon@hotmail.com
http://www.milkywayceramics.com/cgallery/asharon.htm
http://www.israelceramics.org/index.html
* * * * * * * *
www.photoisland.com
ID: sharon@shoval.org.il
Password:clay
_________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.
K Boyle on tue 23 jan 01
Hi Charles,
I got this from Tony Birks "The Complete Potter's Companion".
It works well at cone six, and seems to work well at cone 5. It is NOT
food safe, so use a liner glaze on any functional work. It crackles when
applied thickly....
A good 20-30 minute soak should even out any pinholes....The best ash for
me has been
a "mut" mix of many different woods from wood stoves. Right now I'm using
thoroughly burned
oak ash and don't seem to get the runs etc...Also, I use unwashed
ash...Best of luck!
40 Ash
40 Feldspar
20 ball clay
I make a green with 3-5 copper oxide...
Kevin Boyle
Nightbird Pottery
Elkins, WV
----------
From: Charles
To: CLAYART@LSV.CERAMICS.ORG
Subject: Cone 6 Ash Glazes
Date: Monday, January 22, 2001 7:38 PM
OK folks, I have been having a terrible time developing an ash glaze for
Cone 6 oxidation. Does anyone have a cone 6 ash glaze, or even a fake ash
glaze that is working? I am about at wits end!
I am currently using woodash over another glaze, which just happens to
work perfectly, but I'd like to have a single dip situation and get all the
lovely runs and rivulets I expect and never seem to get.
Thanks so much!
-Charles
Craig Martell on tue 23 jan 01
Charles sez:
>OK folks, I have been having a terrible time developing an ash glaze for
>Cone 6 oxidation. Does anyone have a cone 6 ash glaze, or even a fake ash
>glaze that is working? I am about at wits end!
> I am currently using woodash over another glaze, which just happens
> to work perfectly, but I'd like to have a single dip situation and get
> all the lovely runs and rivulets I expect and never seem to get.
OK Charles:
There's been some work with ash at cone 6 but not as much as cone 10. One
of the reasons that the beading and running type of ash glazes are a little
tougher at cone 6 is the Calcium factor. That's what contributes to the
unusual texture of some ash glazes. If you look at the seger formula for
these runners, the Calcium (Ca) is at .8 or higher. So, on the molecular
level, 80% or more flux molecules are Ca. and calcium is a high temp
flux. You need some additons of more aggressive fluxes at cone 6.
I've done a bit of cone 6 work with ash and have produced some runners and
beaders. I don't have any recipes to give you but perhaps I can help a bit
so you can develop your own.
You need to have an ash source that is high in calcium. The % anaysis for
Ca should be about 50%. I would try some line blends with Soda Feldspar
and ash. Then try a blend with Nepheline Syenite and ash. These blends
may bring you to the doorstep but to get the Ca up to the level you need,
some early aggressive fusers will help a lot. Try triaxial blends
with: Soda Spar, ash, and Cadycal 100. Cadycal is a good choice because
it is a calcium/borate and the boron will give you some real melting power
and the calcium will help getting to the .8 level. I made some nice beige
and brown runny ash glazes at cone 6 Ox. with blends of Jasper slip, wood
ash, and Cadycal 100. If you don't want any earthy colors, don't use the
iron bearing clay slips such as Jasper, Albany, or Alberta. You can also
tone the browns down by doing quadraxials with Soda spar or Neph sy. and
ash, slip, and cadycal. You could also try adding some lithium carbonate
but keep it low, say about 2% of the finished recipe.
Once you've found a flux makeup that looks good you can then begin adding
some alumina and silica to bring the glaze into balance. If you are
familiar with Ian Currie's grid method, that is the best method I can
recommend for blending clay and silica into any flux base. The downside of
these runny ash glazes is that they have to be low in silica and alumina to
run as they do. They don't make the best functional glazes so you have to
be selective about where they are used.
hope this helps, Craig Martell in Oregon
Wade Blocker on wed 24 jan 01
Charles,
The following recipe by Val Cushing is a very good ash glaze:
Val Cushing G4 cone 5 - 6
Wood ash 50.00
Gerstley Borate 20.00
Whiting l2.00
EPK 8.00
Flint 10.00
I tested this glaze and it works. For some reason it did not appear on
Clayart when I first posted it. Mia in ABQ
Lois Ruben Aronow on thu 25 jan 01
On Wed, 24 Jan 2001 17:48:09 -0700, you wrote:
>Charles,
> The following recipe by Val Cushing is a very good ash glaze:
>
>Val Cushing G4 cone 5 - 6
>
> Wood ash 50.00
> Gerstley Borate 20.00
> Whiting l2.00
> EPK 8.00
> Flint 10.00
>
> I tested this glaze and it works. For some reason it did not appear =
on
>Clayart when I first posted it. Mia in ABQ
>
I am curious - what clay body did you use and what sort of ash did you
use?
I recently (last month) tested this on standard 213 porcelain, with
generic wood stove ash (mostly cherry). While i got a GORGEOUS green
colour, the glaze did not move one iota. No running. No rivulets.
any ideas? =20
As always...your mileage may vary.
Wade Blocker on thu 25 jan 01
Lois,
I used this recipe on a white stoneware body. Cone 5-10 from Laguna. I
no longer use this particular stoneware. I used unwashed pine ash. I also
added CMC to the glaze so that I could get a thicker covering that would
not flake off. The color was greenish, but the glaze had all the rivulets
and movement that one associates with an ash glaze. This glaze was fired to
cone 5 1/2. Cone 5 completely bent, and cone 6 just beginning to do so, one
hour long soak. I would try testing this again. Cherry ash is a hardwood
ash, whereas Pine is a softwood ash, that might make a difference in the
behaviour of the glaze. Hope this helps. Mia in chilly ABQ
Edouard Bastarache on fri 30 sep 11
Testotaj glazuroj estas ili.
http://cone6ashglaze.blogspot.com/
Gis,
Edouard Bastarache=3D20
Spertesperantisto=3D20
Sorel-Tracy
Quebec
http://www.flickr.com/photos/30058682@N00/
http://edouardbastarache.blogspot.com/
http://edouardbastaracheblogs2.blogspot.com/
http://www.facebook.com/edouard.bastarache
Sumi von Dassow on sat 1 oct 11
Edouard
I looked at the website and saw the recipes listing "Ash Behrens" but I
couldn't find the actual mixture of materials that "ash Behrens" is
composed of. Evidently I am missing something because this mixture is
the whole point of the website but all I can find is the chemical
analysis of the mixture. Can you tell us what the mixture is, or point
me to it on the website? I'm sorry for bothering you with this.
Sumi
> Testotaj glazuroj estas ili.
>
> http://cone6ashglaze.blogspot.com/
>
> Gis,
>
> Edouard Bastarache
> Spertesperantisto
>
> Sorel-Tracy
> Quebec
>
> http://www.flickr.com/photos/30058682@N00/
> http://edouardbastarache.blogspot.com/
> http://edouardbastaracheblogs2.blogspot.com/
> http://www.facebook.com/edouard.bastarache
>
>
>
--
Sumi von Dassow
www.herwheel.com
sumi@herwheel.com
Edouard Bastarache on sat 1 oct 11
Potash feldspar 15
Whiting 60
Kentucky OM #4 9
Magnesium carbonate 4
Bone ash 7
Red iron oxide 0.5
Rutile 0.1
Fluorspar 0.1
Vanadium pentoxide 0.05
----- Original Message -----
From: "Sumi von Dassow"
To:
Sent: Saturday, October 01, 2011 4:11 PM
Subject: Re: Cone 6 ash glazes
> Edouard
>
> I looked at the website and saw the recipes listing "Ash Behrens" but I
> couldn't find the actual mixture of materials that "ash Behrens" is
> composed of. Evidently I am missing something because this mixture is
> the whole point of the website but all I can find is the chemical
> analysis of the mixture. Can you tell us what the mixture is, or point
> me to it on the website? I'm sorry for bothering you with this.
>
> Sumi
>> Testotaj glazuroj estas ili.
>>
>> http://cone6ashglaze.blogspot.com/
>>
>> Gis,
>>
>> Edouard Bastarache
>> Spertesperantisto
>>
>> Sorel-Tracy
>> Quebec
>>
>> http://www.flickr.com/photos/30058682@N00/
>> http://edouardbastarache.blogspot.com/
>> http://edouardbastaracheblogs2.blogspot.com/
>> http://www.facebook.com/edouard.bastarache
>>
>>
>>
>
>
> --
> Sumi von Dassow
> www.herwheel.com
> sumi@herwheel.com
>
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