nsmheralds@netzero.net on sat 25 mar 06
I'm looking for a green slip I can use in woodfire. Part of the design =
with which I plan to decorate one of my pieces calls for green or blue-g=
reen in one of the design elements. Copper, chromium and Nickel are the=
three I know that give good greens at highfire. There's a standing rul=
e at the kilns in which I fire that copper and cobalt shall not be used =
unless all participants agree upon it. Nickel and chromium also volatil=
ize, but to what extent? Is there something I can use to get a reliable=
green slip that would be suitable in woodfire? Or should I abandon thi=
s line and use iron for all the design elements?
=
Nathan Miller
Thistillium Pottery
Newberg, OR
=
Hank Murrow on sat 25 mar 06
On Mar 24, 2006, at 10:19 PM, nsmheralds@netzero.net wrote:
> I'm looking for a green slip I can use in woodfire. Part of the
> design with which I plan to decorate one of my pieces calls for green
> or blue-green in one of the design elements. Copper, chromium and
> Nickel are the three I know that give good greens at highfire.
> There's a standing rule at the kilns in which I fire that copper and
> cobalt shall not be used unless all participants agree upon it.
> Nickel and chromium also volatilize, but to what extent? Is there
> something I can use to get a reliable green slip that would be
> suitable in woodfire? Or should I abandon this line and use iron for
> all the design elements?
Dear Nathan;
I use a cobalt/rutile slip (1%/4%) in the salt and/or woodfire to get a
nice green. The advantage is that you avoid the 'paint' look that
chrome gives.
Cheers, Hank
www.murrow.biz/hank
Kristina Pell on sat 25 mar 06
I have used Mason Stains in woodfire with some success but I believe you may need to use the ones with inclusion pigments.
"nsmheralds@netzero.net" wrote: I'm looking for a green slip I can use in woodfire. Part of the design with which I plan to decorate one of my pieces calls for green or blue-green in one of the design elements. Copper, chromium and Nickel are the three I know that give good greens at highfire. There's a standing rule at the kilns in which I fire that copper and cobalt shall not be used unless all participants agree upon it. Nickel and chromium also volatilize, but to what extent? Is there something I can use to get a reliable green slip that would be suitable in woodfire? Or should I abandon this line and use iron for all the design elements?
Nathan Miller
Thistillium Pottery
Newberg, OR
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clennell on sat 25 mar 06
Green slip
Here is our general purpose slip for gas reduction, wood or salt. I call it
Voulkos slip??
Ball 100
EPK 100
Nep Syn 125
Silica 150
For colour
bright blue 3% cobalt oxide
cockroach yellow 30% rutile (yes you read right 30%)
for green take a cup of blue and a cup of cockroach and mix them together
for the nicest green you'll ever see. Try different variations for different
greens- l cup blue , 2 cups cockroach, etc, etc.
Good luck,
tony
James and Sherron Bowen on mon 27 mar 06
I have this recipe in my collection. No copper. Not totally sure where I got
it.
Doudy's Salt Slip
50% Kaolin
50%flint
+8% Rutile
+2% Cobalt Carb
+2% Bentonite
=============================================================
John Britt on mon 27 mar 06
>
>Doudy's Salt Slip
>50% Kaolin
>50%flint
>+8% Rutile
>+2% Cobalt Carb
>+2% Bentonite
>=============================================================
>
>__________________________________________________________________________
____
>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.
James,
The funny thing about this slip recipe:
>
>Doudy's Salt Slip
>50% Kaolin
>50%flint
>+8% Rutile
>+2% Cobalt Carb
>+2% Bentonite
is that we used to use it as a cone 6
kiln wash (without colorants).
John Britt
www.johnbrittpottery.com
James and Sherron Bowen on mon 27 mar 06
So do I. It works fine for that. Do the colorants provide any fluxing power?
With all that silica it should look great in salt don't you think? How about
with wood fire and ash deposits?
JB
----- Original Message -----
From: "John Britt"
To: ; "Jim Bowen"
Sent: Monday, March 27, 2006 12:51 PM
Subject: Re: Green slip for woodfire
> >
>>Doudy's Salt Slip
>>50% Kaolin
>>50%flint
>>+8% Rutile
>>+2% Cobalt Carb
>>+2% Bentonite
>>=============================================================
>>
>>__________________________________________________________________________
> ____
>>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.
>
> James,
>
> The funny thing about this slip recipe:
>
>>
>>Doudy's Salt Slip
>
>>50% Kaolin
>>50%flint
>
>
>>+8% Rutile
>>+2% Cobalt Carb
>>+2% Bentonite
>
> is that we used to use it as a cone 6
> kiln wash (without colorants).
>
> John Britt
> www.johnbrittpottery.com
>
>
Hank Murrow on mon 27 mar 06
On Mar 27, 2006, at 12:30 PM, James and Sherron Bowen wrote:
> So do I. It works fine for that. Do the colorants provide any fluxing
> power?
> With all that silica it should look great in salt don't you think? How
> about
> with wood fire and ash deposits?
Dear James;
Of course, thie slip you refer to would be great in soda or salt. Since
wood ashes are mostly calcium, I imagine that such a slip with its high
silica is just 'waiting' for some fly ash to land on it. and the
cobalt/titanium green you are looking for loves calcium. Try it to
confirm, and let us know.
Cheers, Hank
www.murrow.biz/hank
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