Gskwira@AOL.COM on fri 26 may 00
Technique sounds intriguing. A question re. use in an electric kiln: Does this cause damage to the coils/fire brick?
--Greg Skwira
Alisa and Claus Clausen on fri 16 jun 00
Thanks to Chris and Dannon,
I tried this soda wash with rutile added.
I used Chris' suggestion of 1.5 lts. hot, not boiling water
300 gr. soda ash mixed slowly, but did not use a blender, just hand =
mixed
15 gr. of rutile
5 gr. bentonite, mixed first and then added last
I brushed the bisqued pots and avoided the bottom.
Nothing migrated in the kiln, fired to cone 6 ox.
I used iron spotted stoneware. I got a light organe surface and the =
rutile left ridges of browns.
On the clay with not iron, I got a color I like better, a deeper orange =
with brown edges.
Very nice alternative to glaze for non functional ware. I did line all =
the vessels with a functional glaze, but
I would next time use this on large platters. =20
On one big bowl, the contrast of the deep orange on the outside to a =
turkquoise mat on the inside was very
magnificant, thinks I.
I applied the soda ash wash about 48 hours before I fired, and the pots =
glistened like diamonds.
Great, great technique.
Thanks again,
Alisa in Denmark
Dave Murphy on fri 16 jun 00
----- Original Message -----
From: Alisa and Claus Clausen
To:
Sent: Friday, June 16, 2000 4:30 AM
Subject: Soda ash wash
Thanks to Chris and Dannon,
I tried this soda wash with rutile added.
I used Chris' suggestion of 1.5 lts. hot, not boiling water
300 gr. soda ash mixed slowly, but did not use a blender, just hand mixed
15 gr. of rutile
5 gr. bentonite, mixed first and then added last
I brushed the bisqued pots and avoided the bottom.
Nothing migrated in the kiln, fired to cone 6 ox.
I used iron spotted stoneware. I got a light organe surface and the rutile
left ridges of browns.
On the clay with not iron, I got a color I like better, a deeper orange with
brown edges.
Very nice alternative to glaze for non functional ware. I did line all the
vessels with a functional glaze, but
I would next time use this on large platters.
On one big bowl, the contrast of the deep orange on the outside to a
turkquoise mat on the inside was very
magnificant, thinks I.
I applied the soda ash wash about 48 hours before I fired, and the pots
glistened like diamonds.
Great, great technique.
Thanks again,
Alisa in Denmark
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Eydie DeVincenzi on sun 18 jun 00
>I tried this soda wash with rutile added. I used Chris' suggestion of 1.=
5
lts. hot, not boiling water 300 gr. soda ash mixed slowly, but did not us=
e
a blender, just hand mixed 15 gr. of rutile 5 gr. bentonite, mixed first
and then added last
<
I think I missed the early part of this thread of messages. Could someon=
e
tell me the purpose of the bentonite and rutile? Thanks
Eydie
Anne Novak on wed 28 jun 00
I joined Clayart a couple of weeks ago, and I've been lurking ever =
since. (Overwhelmed - I don't often get to meet clay people.) I hope =
sometime I'll have something to contribute, but right now I just have =
questions.
I want to experiment with soda ash washes on some of my sculptures but I =
am concerned that the soda ash will volatize and damage my kiln. It is =
electric, and not coated with ITC. Will this be a problem? Should I use =
saggars? I'd rather not make them if I don't have to.
What is the firing range? Searching the archives I found that Janet =
Walker sprayed her pots with a soda ash solution, and fired them to cone =
6, electric. Don Prey used a mixture of equal parts washing soda and =
ball clay, and fired it to Cone 10. What was the purpose of the ball =
clay? Would soda ash alone have worked at this temperature? How about =
low fire? Mia, you wrote that soda ash is a low temperature flux. How =
low?=20
Alisa, I printed your posting about using a soda ash wash with iron, and =
- I think - rutile added to the solution. Were they added just for =
color? How high did you fire your pieces?
Thanks to anyone who can help me, either with answers to these questions =
or to others I haven't thought of yet.
Anne, in Ucluelet, where the fog has rolled in after two whole days of =
sun.
DONPREY@AOL.COM on thu 29 jun 00
In a message dated 6/29/2000 1:34:31 PM, anovak@ISLAND.NET writes:
<< Don Prey used a mixture of equal parts washing soda and ball clay, and
fired it to Cone 10. What was the purpose of the ball clay? >>
Hi Anne,
The ball clay promotes color development....mostly from the iron in the clay.
I was using this on a white-firing, iron free clay body and wanted the
orange blush from the iron. Just remember that soda is the flux and color
will come from metal oxides.....then start your lifelong quest for your
perfect combination.
Regards, Don Prey in Oregon
Wade Blocker on thu 29 jun 00
Anne,
Soda ash Na2CO3, sodium carbonate, is an active flux for low temperature
glazes, but due to its highly soluble nature it is generally used in frit
form to prevent recrystallization in the glaze solution- melting point is
887 to 932 degrees.I believe Alisa fires to cone 6.Hope this helps. Mia in
ABQ
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