Scott Simpson on fri 5 nov 99
I was looking at the clayart requests for a lost glaze and I ran on to one I
seem to have tried and it was bronze but not weathered. It is a glossy glaze
which can be textured.
Try this one next time.
Bronze
Manganese 60
Copper ox. 10
red clay 20
china clay 10
recipe by Steve Ogden.
2120F.
oxidation
Thanks again,
Scott Simpson
Hummingbird Pottery
Floydada, Texas 79235
Candise Flippin on sat 6 nov 99
Scott,
I am interested in this glaze, but I have a couple of ?'s. Is the
Manganese Carbonate or Dioxide? And is the Copper Oxide red or black?
Thanks, Candise in San Diego
Scott Simpson on sun 7 nov 99
On Sat, 6 Nov 1999 20:50:26 EST, Candise Flippin
wrote:
>----------------------------Original message----------------------------
>Scott,
>
>I am interested in this glaze, but I have a couple of ?'s. Is the
>Manganese Carbonate or Dioxide? And is the Copper Oxide red or black?
>
>Thanks, Candise in San Diego
Hi Candise,
I use the manganese dioxide and I haven't got any red copper oxide so I
guess it is Black. Here are some more replies last spring about the glaze.
It might give a different look with the red oxide, but I just didn't have
any at that time.
Scott Simpson
Here are some others too!
__________________________________________________
>From Susan Peterson's, the craft and art of clay
Bill Shillalies' Metallic death glaze
black copper oxide 4
cobalt oxide 2
manganese dioxide 35
ball clay 4
red art 46
flint 4
red iron oxide 2
dark rutile 3
fired to cone 02 application thick, bronze colored, very matte
fired to cone 1, application thick, bronze colored, semi-matte
fired to cone 6, application thick, semi-gloss, metallic-bronze and
antique
(Peterson 357)
_____________________________
This glaze is poisonous unfired. It is poisonous when fired. It is
poisonous on green eggs and Ham. It is poisonous if you breath it, if
you look at it wrong, and maybe you can absorb Mn through your skin?
This glaze should be in the ammendment of the "Susan
Peterson/incompetant" thread - 'cause there ain't no warnings!
I was given these a few years ago by an english girl who passed through
my studio. She used the following quite succesfully on her own work. Her
work looked good, I should know, it's still in my house. Let me know
how you go!
Matt Black/GoldStoneware # 1
Ball Clay 40
Manganese Dioxide 40
Copper Carbonate 20
Gold/ Black Matt Stoneware #2
Powdered Porcelain 50
Manganese Dioxide 50
Copper carbonate 10
Cobalt oxide 2
Fire from 1,000 to 1,280 C. The lower the firing tempearature the more
bronzy the colour. Apply by brush to give an opaque coating. Normal
glaze thickness will lead to running. Good luck
And not safe for anyone breathing the kiln fumes either!
RR
>----------------------------Original message----------------------------
>I attended a Kathy Triplett workshop recently, she gave us some of her
glaze
>recipes.
>
>Bronze (cone2-6) NOT FOOD SAFE!!!
>manganese dioxide 60
>copper oxide 10
>any red clay 20
>kaolin 10
> __
> 100
>
________________________
There's a very useful article in a recent Ceramic Review (it was either
no 174 or 175) about bronze/gold glazes.
In my tests I found that the most important oxides were Manganese
Dioxide and Copper Oxide.
The ratio is also important. It seemed to me that the best gold/bronze
colour was from a ratio of Manganese Dioxide 90% to Copper Oxide at 10%.
You can then add some china clay if it's too runny at your firing
temperature. However, you might get away with a neat mixture of the
above at earthenware.
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