Tom's E-mail on tue 25 feb 03
I've been to the archives, through old CMs, PMIs and Clay Times and have =
easily tried about 20 cone 6 fake ash glazes; I've tried synthesizing my =
own ash, obtained ash from Axner's and while I got a few glazes that are =
passable, I've not had really good results. I have a wonderful Cone 9-10 =
fake ash that I tried modifying but it didn't turn out very good. Does =
anyone have a good/smashing cone 6 fake ash that they would share?
P.S. I know God pretty well and will put in a good word for you.
Tom Sawyer
tsawyer@cfl.rr.com
TedFab Faber on tue 25 feb 03
Tom
The following is a cone 6 glaze I developed at OSU. Note I used Albany
slip. I still have a few pounds of Albany and Gerstley Borate . However, I
have not tested the glaze with Alberta Slip. If you have problems let me
know. I can work on a more modern formula. I have been out of clay for a few
years. I'm just starting to get back into clay. Oh. who was the first potter
? why God of course. Remember what Adam was made from a river bank soil.
Ted the Tech
Albany 59
Whiting 29
Barium Carb 12
Gerstley Borate 10
Colbalt Oxide 1/2 %
Rutile 4%
----- Original Message -----
From: "Tom's E-mail"
To:
Sent: Tuesday, February 25, 2003 5:02 PM
Subject: Cone 6 Fake Ash Glaze
I've been to the archives, through old CMs, PMIs and Clay Times and have
easily tried about 20 cone 6 fake ash glazes; I've tried synthesizing my own
ash, obtained ash from Axner's and while I got a few glazes that are
passable, I've not had really good results. I have a wonderful Cone 9-10
fake ash that I tried modifying but it didn't turn out very good. Does
anyone have a good/smashing cone 6 fake ash that they would share?
P.S. I know God pretty well and will put in a good word for you.
Tom Sawyer
tsawyer@cfl.rr.com
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Carol Tripp on wed 26 feb 03
Hi Tom,
I have not tried this one but Cindy Strnad posted this in Oct 2001 saying,
"...burnt yellow with great drips... needs a slow cool".
GOLDEN FAKE ASH ^6 (Cindy's version)
29 redart
21 om #4
5 bone ash
9 strontium
24 dolomite
10 gerstley borate
2 lithium
Someone named Andie uses a slightly different version and she gets a brown
matt breaking yellow, runs in rivelets and has no pinholes and is
"stunning". (Haven't tried this one either)
Andie's GOLDEN FAKE ASH
27 redart
20 om#4
5 bone ash
12 strontium
24 dolomite
10 gertsley borate
2 lithium
I use a Val Cushing ^6 wood ash glaze:
50 wood ash (mine is from someone's bbq & of unknown content)
20 gerstley borate (I sustituted F-3134)
12 whiting
8 epk
10 silica
2 bentonite
I add 5% rutile and 3% cobalt carb and get a silver grey that runs in
rivelets down the side of Xaviers Warm Jade Green - wonderful. It also
looks great over Xaviers made with the Floating Blue combo of oxides.
It runs blue down just about ever other glaze I have.
Good luck,
Carol
Dubai, UAE
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Craig Martell on thu 27 feb 03
Hi:
Florida Tom wanted some fake ash recipes and Ted the Tech sent this
one. Probably a nice fake ash but don't use this one on surfaces meant for
food. It's too low in silica and alumina and I'd bet the farm there will
be some significant barium leaching. For decorative pots it's ok, of
course, but not for domestic ware.
>Albany 59
>Whiting 29
>Barium Carb 12
>Gerstley Borate 10
>
>Colbalt Oxide 1/2 %
>Rutile 4%
One of the problems with ash glazes and synthetic ash glazes at cone 6, if
you want stringing and beading, is that you need a hi calcium level in the
glaze for this effect and Ca has a fairly hi melt temperature. If you are
mucking about with the Seger Formula, the stringers and beaders usually
have a value of 0.8 or higher and this is hard to melt at cone 6 unless you
use some real aggressive auxiliary fluxes. My suggestion would be to try
some sodium/borate frits, gerstley borate or some of the excellent GB subs,
Nepheline Syenite, Soda Spar, for auxiliary fluxes to the Ca. If you want
some earthy stuff, try Jasper slip, Albany, Alberta, plus whiting and a
very radical oxide flux.
It's important to remember that the stringers and beaders are basically "hi
flux" glazes and will usually be low in silca and alumina. Get as much
SiO2 and Al2O3 into the glaze as you can without destroying the visual
effect that you'd like to have. Remember too, no body said this would be easy!
regards, Craig Martell Hopewell, Oregon
Ababi on thu 6 mar 03
Lately I use another attitude in glazing especially while imitating "other glazes" I don't
call it fake because I spend a lot of time doing it I call it "Follow" or "Looks like"..
It is defiantly good to read a book on the subject - I might re read Tichan's book, I did
not understand it when I read it the first time.
What are we looking for: A glaze that will look like and behave like an ash glaze:
What is in this ash that unfortunately I cannot buy because I live in the big city?
There is P2O5 I will use bone ash
A bit of Manganese I will add 0.5 manganese.
Now What can help us? I will surprise you: Try to sieve 30-50 mesh out of the soil of
your garden add to it 30% flux
Does it look like what you have looked for?
Another approach one way to owners of glaze software and the second to the rest of
you:
I presume that you like me do not understand the meaning of all the numbers that
Lawrence Tony or John or Bob are giving us: It is good! At least in this case:
When I try to rebuild a similar glaze I have to look for materials that will have similar
numbers.
In Matrix I use a lot the surface tension, in Insight you can try to play with the
molecular weight, and the other aids. Let me try, this time in Insight:
Ababi's ultimate ash glaze for 1220C
====================================
wood................ 40.00 40.00%
FRIT 3134........... 20.00 20.00%
EPK KAOLIN.......... 20.00 20.00%
SILICA.............. 20.00 20.00%
========
100.00
CaO 0.49* 14.74%
MgO 0.12* 2.67%
K2O 0.22* 11.19%
Na2O 0.17* 5.78%
TiO2 0.00 0.08%
Al2O3 0.15 8.09%
B2O3 0.13 4.85%
P2O5 0.05 3.79%
SiO2 1.37 44.62%
Fe2O3 0.02 1.84%
MnO 0.06 2.35%
Si:Al 9.36
SiB:Al 10.24
Expan 10.78
Looks fine will be runny . 0.5 cobalt will be fine:
OK what next to make a glaze with
Si:Al 9.36
Expan 10.78
Weight 182 Atomic? Molecular? I do not know: A number!
I will try to ignore the first recipe.
I cannot do it because I do not know the atomic weight.
Might be wrong can be done in the regular way of substitution recipes in both
programs.
To the rest of you.
Choose a glaze you made and was runny, or an 04^ translucent glaze add ( some
tests will be better I recommend the new addition of The Ceramic spectrum by
Robin, I am sure he will be glad if you buy this one too and will sign it for you . Tell him I
said so!)
so take that glaze add to it 0.5 Manganese dioxide 0.5-1% Red iron or black iron oxide.
0.5 cobalt any, and apply on a proper test -vase better above a plate to collect the
runny glaze.
There is no need to fire the Yosemite in order to "fake" this appearance
More to come
Ababi Sharon
Glaze addict
Kibbutz Shoval Israel
ababisha@shoval.org.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
and also
http://www.israel-ceramics.org/membersGallery/personalpage.asp?MID=507
---------- Original Message ----------
>Hi Tom,
>I have not tried this one but Cindy Strnad posted this in Oct 2001 saying,
>"...burnt yellow with great drips... needs a slow cool".
>GOLDEN FAKE ASH ^6 (Cindy's version)
>29 redart
>21 om #4
>5 bone ash
>9 strontium
>24 dolomite
>10 gerstley borate
>2 lithium
>Someone named Andie uses a slightly different version and she gets a brown
>matt breaking yellow, runs in rivelets and has no pinholes and is
>"stunning". (Haven't tried this one either)
>Andie's GOLDEN FAKE ASH
>27 redart
>20 om#4
>5 bone ash
>12 strontium
>24 dolomite
>10 gertsley borate
>2 lithium
>I use a Val Cushing ^6 wood ash glaze:
>50 wood ash (mine is from someone's bbq & of unknown content)
>20 gerstley borate (I sustituted F-3134)
>12 whiting
>8 epk
>10 silica
>2 bentonite
>I add 5% rutile and 3% cobalt carb and get a silver grey that runs in
>rivelets down the side of Xaviers Warm Jade Green - wonderful. It also
>looks great over Xaviers made with the Floating Blue combo of oxides.
>It runs blue down just about ever other glaze I have.
>Good luck,
>Carol
>Dubai, UAE
>_________________________________________________________________
>The new MSN 8: advanced junk mail protection and 2 months FREE*
>http://join.msn.com/?page=features/junkmail
>______________________________________________________________________________
>Send postings to clayart@lsv.ceramics.org
>You may look at the archives for the list or change your subscription
>settings from http://www.ceramics.org/clayart/
>Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
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