Eric Newman on mon 27 feb 12
Many years back I read (I'm pretty sure it was in CM) a short article on =
=3D
a low-fire=3D20
copper-saturated glaze that you fired in an electric kiln (no reduction) =
=3D
but then=3D20
could get great copper flashing effects by torching with a propane torch.=
=3D
In fact,=3D20
I made up a sample and it worked wonderfully. Unfortunately I can find n=
=3D
either=3D20
my notes nor the CM article....anyone out there have this recipe and the =
=3D
firing=3D20
temp (cone 06?)?
Jeff Brown on mon 27 feb 12
On Mon, 27 Feb 2012 10:55:27 -0500, Eric Newman=3D20
wrote:
>Many years back I read (I'm pretty sure it was in CM) a short article on=
=3D
a low-
fire=3D20
>copper-saturated glaze that you fired in an electric kiln (no reduction)=
=3D
but then=3D20
>could get great copper flashing effects by torching with a propane torch=
=3D
. In=3D20
fact,=3D20
>I made up a sample and it worked wonderfully. Unfortunately I can find =
=3D
neither=3D20
>my notes nor the CM article....anyone out there have this recipe and the=
=3D
firing=3D20
>temp (cone 06?)?
=3D20
the article had Valdez in the title... I have done this to brighten up, =
=3D
and give=3D20
more color to dull raku pieces...after they come out of the post reducti=
=3D
on cans=3D20
The trick is to torch the pots before the get cold, and the quench them b=
=3D
efore=3D20
the color fades.
Pottery by John on mon 27 feb 12
The Valdez Flashfiring uses a glaze called Copper Lust and must first be
fired in heavy reduction prior to using the torch to selectively bring out
color after is has cooled from the kiln firing. Copper Lust has both Cobal=
t
Carbonate and Copper Carbonate as colorants.
John Lowes
Sandy Springs, Georgia
http://wynhillpottery.weebly.com/
Eric Newman on mon 27 feb 12
woo hoo - found it in Clay Times - Jan/Feb 99....a Lana Wilson article. =
=3D
Thx all!
Witt Electric Raku=3D20
Cone 04 Oxidation=3D20
Copper Carbonate 4 Parts=3D20
Kaolin 2 Parts=3D20
Bentonite 1/2 Part=3D20
Pottery by John on thu 1 mar 12
There were some instructions with the glaze recipe that might help as well:
After firing the glaze to cone 04, it is torched with an acetylene
torch to produce raku peacock feather colors. A fine point flame
produces dramatically better results."
"Overall heating of the piece -first in a kiln or with the torch-will
prevent cracking"
John Lowes
Sandy Springs, Georgia
http://wynhillpottery.weebly.com/
----- Original Message -----
From: "Eric Newman"
To:
Sent: Monday, February 27, 2012 8:10 PM
Subject: Torching Raku
woo hoo - found it in Clay Times - Jan/Feb 99....a Lana Wilson article. Th=
x
all!
Witt Electric Raku
Cone 04 Oxidation
Copper Carbonate 4 Parts
Kaolin 2 Parts
Bentonite 1/2 Part
Eric Newman on thu 8 mar 12
If anyone coming to NCECA is interested in seeing some of the possible ef=
=3D
fects=3D20
you can get with the Witt Electric Raku glaze, I will have some pots with=
=3D
it as=3D20
part of the "Cairns for Corrine" exhibit at the Seattle Design Center. I=
=3D
look=3D20
forward to seeing y'all there!
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