Talbott on sun 15 dec 96
In reference to my previous post has anyone out there tried substituting
copper powder or copper dust in place of copper carbonate in their
copper-red glaze recipe? If so what kind of results did you obtain???
Thanks.. Marshall
Celia & Marshall Talbott
Pottery By Celia
Route 114
P.O. Box 4116
Naples, Maine 04055-4116
(207)693-6100 voice and fax
clupus@ime.net
Clyde Wynia on mon 16 dec 96
At 11:22 AM 12/15/96 EST, you wrote:
>----------------------------Original message----------------------------
>In reference to my previous post has anyone out there tried substituting
>copper powder or copper dust in place of copper carbonate in their
>copper-red glaze recipe? If so what kind of results did you obtain???
>Thanks.. Marshall
Some one gave me 150 lbs of copper powder. I use it in the raku glazes with
excellent results. Any source of copper seems to work in raku. I have not
tried it in other glazes, but intend to.
Wear a mask if when you mix it into glazes. It is hard to get it to "wet"
and so floats in the air causing an awful copper taste and irritating the
nose. I always put some liquid detergent in the water to help it "wet" and
therefor mix with the water and other ingredients. After setting a few
hours the glaze turns the copper blue/green color. Maybe it has turned to
copper carbonate????? Sometimes the glaze turns black. Copper oxide????
Clyde Wynia
M222 Sugarbush Lane
Marshfield, WI 54449
715-387-1653 Home
715-387-2580 Office
715-387-1212 Fax
John Britt on mon 16 dec 96
Celia and Marshall
There are some wonderful references to copper reds in the Studio
Potter. You have to research the years but probably in the late 1970's
and early 80's.
There are also several great articles in Ceramics Monthly. One is
called "Taking the Uncertainty out of Copper Reds", I think it was
1992?
Also try "Stoneware Glazes" by Ian Currie.
--
Bye, Bye,
John Britt
Dys-Functional Pottery
http://www.erinet.com/claydude/britt1.html
Suzanne Storer on tue 17 dec 96
Clyde wrote about the difficulty of mixing copper powder and the awful taste
in the air and nose irritation when he did so. If you really need to
continue using copper in this form you should mix it outdoors where air
currents can dilute the airborn dust. As potters our lungs are what we need
to protect more than anything and if you're smelling it, you're breathing
it. I weigh and mix my metal oxides (and any other groaties) outdoors
wearing a good respirator mask and don't remove the mask until the colorant
is in a totally wet state. 08:46 AM 12/16/96 EST, you wrote:
>----------------------------Original message----------------------------
>At 11:22 AM 12/15/96 EST, you wrote:
>>----------------------------Original message----------------------------
>>In reference to my previous post has anyone out there tried substituting
>>copper powder or copper dust in place of copper carbonate in their
>>copper-red glaze recipe? If so what kind of results did you obtain???
>>Thanks.. Marshall
>
>Some one gave me 150 lbs of copper powder. I use it in the raku glazes with
>excellent results. Any source of copper seems to work in raku. I have not
>tried it in other glazes, but intend to.
>
>Wear a mask if when you mix it into glazes. It is hard to get it to "wet"
>and so floats in the air causing an awful copper taste and irritating the
>nose. I always put some liquid detergent in the water to help it "wet" and
>therefor mix with the water and other ingredients. After setting a few
>hours the glaze turns the copper blue/green color. Maybe it has turned to
>copper carbonate????? Sometimes the glaze turns black. Copper oxide????
>
>
>Clyde Wynia
>M222 Sugarbush Lane
>Marshfield, WI 54449
>715-387-1653 Home
>715-387-2580 Office
>715-387-1212 Fax
>
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