Ken Russell on wed 21 jan 98
>>I now make up a slip by mixing the metal oxide into the same clay as the
body.
How long did it take you to get the same results with copper when you
started mixing with slip? I tried that a few times with china clay,
percentages up to 8% but green was either olive drab or WAY too light. The
green I'm getting really is stunning with the straight oxide and water but
man I have to hold my mouth just right when I mix it up or it gets either
too washed out and wimpy or goes metallic.
>>Copper oxide is still prone to variation, according to the thickness with
which it is
>>brushed on,
Man, don't I know it. Overfired and it goes dark vomit. I'll try mixing
the stuff with the my clay.
Have you ever tried combinations of chrome ox and copper? I've been playing
with chrome and copper carb but the stinkin' cobalt overpowers. My last
shot was 3 to 1 by weight so I'll have to try more chrome and keep playing
with it.
I leave for the Chicago Gift Show tonight so I'll probably be off clayart
for about a week. Thanks for your help.
Ken Russell
The Arlington Pottery
gone2pot@iw.net
David Hewitt on fri 23 jan 98
Ken,
The final colour is of course affected by the glaze, its thickness and
firing, as well as the strength of the water / oxide mix on the
greenware. As I said, I do not get the same results every time, but I
find they are more consistent using the oxide in a slip. At least I know
how much oxide is in any amount of slip. All I am having control at that
stage is the thickness of the application.
Hope that you enjoy the Chicago Gift Show.
In message , Ken Russell writes
>----------------------------Original message----------------------------
>>>I now make up a slip by mixing the metal oxide into the same clay as the
>body.
>
>How long did it take you to get the same results with copper when you
>started mixing with slip? I tried that a few times with china clay,
>percentages up to 8% but green was either olive drab or WAY too light. The
>green I'm getting really is stunning with the straight oxide and water but
>man I have to hold my mouth just right when I mix it up or it gets either
>too washed out and wimpy or goes metallic.
>
>>>Copper oxide is still prone to variation, according to the thickness with
>which it is
>>>brushed on,
>
>Man, don't I know it. Overfired and it goes dark vomit. I'll try mixing
>the stuff with the my clay.
>
>Have you ever tried combinations of chrome ox and copper? I've been playing
>with chrome and copper carb but the stinkin' cobalt overpowers. My last
>shot was 3 to 1 by weight so I'll have to try more chrome and keep playing
>with it.
>
>I leave for the Chicago Gift Show tonight so I'll probably be off clayart
>for about a week. Thanks for your help.
>
>Ken Russell
>The Arlington Pottery
>gone2pot@iw.net
>
--
David Hewitt
David Hewitt Pottery ,
7 Fairfield Road, Caerleon, Newport,
South Wales, NP6 1DQ, UK. Tel:- +44 (0) 1633 420647
URL http://digitalfire.com/education/people/hewitt.htm
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