Tony Ferguson on wed 13 aug 03
Lar,
The % depends all on what your desired affect is. I would suggest taking a
small spray bottle, fill it up and weigh it. Start with a percentage based
on the weight of the water. Take your X amount of grams then and add it to
the water. Spray. Keep records and you will find your desired color
saturation by reducing or increasing the %. Tell me what type of glazes you
are using as I have other suggestions and tricks.
Thank you.
Tony Ferguson
On Lake Superior, where the sky meets the Lake
Stoneware, Porcelain, Raku and more
by Coleman, Ferguson, Winchester...
www.aquariusartgallery.com
218-727-6339
315 N. Lake Ave
Apt 312
Duluth, MN 55806
----- Original Message -----
From: "Lari Ward"
To:
Sent: Wednesday, August 13, 2003 9:26 PM
Subject: Cobalt and Iron wash
Hi all,
Could anyone please tell me how to make a cobalt wash and also an iron wash?
I know this is basic but for the life of me I can't get one to work. My
iron comes out black and I want brown. The cobalt is speckled. I read that
you use between 3 and 10% cobalt.but that is a huge spread. Also how much
water do I put in? Should I add any other ingredients? I want to spray the
cobalt. Your help is appreciated. Thanks
Lari Ward
In Poulsbo.
Where my husband has spent 2 days getting rid of the computer worm.
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Lari Ward on wed 13 aug 03
Hi all,
Could anyone please tell me how to make a cobalt wash and also an iron =
wash?
I know this is basic but for the life of me I can't get one to work. My
iron comes out black and I want brown. The cobalt is speckled. I read =
that
you use between 3 and 10% cobalt.but that is a huge spread. Also how =
much
water do I put in? Should I add any other ingredients? I want to spray =
the
cobalt. Your help is appreciated. Thanks
=20
Lari Ward
In Poulsbo.
Where my husband has spent 2 days getting rid of the computer worm.
Snail Scott on thu 14 aug 03
At 07:26 PM 8/13/03 -0700, you wrote:
>Could anyone please tell me how to make a cobalt wash and also an iron wash?
>...iron comes out black and I want brown. The cobalt is speckled...
Mix your oxides with a bit of your clay body.
This will make it easier to get a smooth, thin,
and even application. (Not enough clay to make
a slip, just a tiny bit to help with suspension
and even distribution.) Keep the cobalt to a low
percentage and use the carbonate, not the oxide.
-Snail
Rikki Gill on thu 14 aug 03
Also, try using hot water, it helps dissolve the oxides. Rikki
www.rikkigillceramics.com
wwwberkeleypotters.com
----- Original Message -----
From: "Snail Scott"
To:
Sent: Thursday, August 14, 2003 6:48 AM
Subject: Re: Cobalt and Iron wash
> At 07:26 PM 8/13/03 -0700, you wrote:
> >Could anyone please tell me how to make a cobalt wash and also an iron
wash?
>
iandol on fri 15 aug 03
Dear Rikki Gill,
You say <<...try using hot water, it helps dissolve the oxides....>>
This is news to me about Cobalt Oxide and Iron Oxide. I was under the =
impression that they were insoluble in water at any temperature. =
Chemical Properties Table to hand supports this view.
Perhaps you mean "Disperse"
Best regards,
Ivor Lewis. Redhill, South Australia
Kathi LeSueur on sat 16 aug 03
iandol@TELL.NET.AU wrote:
>Dear Rikki Gill,
>
>You say <<...try using hot water, it helps dissolve the oxides....>>
>
>This is news to me about Cobalt Oxide and Iron Oxide. I was under the impression that they were insoluble in water at any temperature. Chemical Properties Table to hand supports this view.
>
>Perhaps you mean "Disperse">>
>
>I wondered about this one, too. I used to tell my students that glaze is a "suspension" of materials and Kool-Aid is a "solution" of materials. How to tell? Let it sit for a day. The Kool-Aid will still be drinkable, not sugar in the bottom, mix at the middle and water at the top. The glaze materials will have begun to settle and water will be coating the surface.
>
>Kathi
>
>
>
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