Judy Shreve on mon 20 mar 06
Dennis
Funny you should ask about this glaze. I just pulled out this one a couple of days ago and sent it to Ron Roy. I want to tweak it to work at ^6 oxidation. The glaze you are referring to -- I think -- is AA Copper, an old Val Cushing glaze (It's in his handbook). It's a gorgeous ^10R glaze. There's even a couple of different colorants to create -- cobalt blue, copper blue-green or taffy. This one is the Copper blue-green:
AA Copper: Cornwall Stone 46.00
Whiting 34.00
EPK 20.00
ADD: Copper Carb 4.00
Tin Oxide 4.00
Ron Roy's advise was that this glaze is short of silica and will not be stable. Also (he said) this much copper is hard to keep in a glaze so beware of leaching.
Judy Shreve
Mountain House Studios
Alpharetta GA
Charter Potter Council Member
Date: Sun, 19 Mar 2006 04:02:37 -0800
From: dennis mclaughlin
Subject: copper blue glaze
Yesterday I was discussing glazes with a friend who was telling me about a
copper blue cone ten reduction glaze she used to use but has since lost the
recipe.
She thought it was called "H and H Copper Blue".
I checked the clayart archive which sometime proves to be very helpful with a
search like this but I had no success.
Does this sound familiar to anyone?
I continue to enjoy the varied discussions that take place on the clayart.
-Denny
Dannon Rhudy on tue 21 mar 06
.........sent it to Ron Roy. I want to tweak it to work at ^6 oxidation.
............
Val Cushing has already made a cone 6 version of
this glaze. Looks very good in oxidation, but none of
the blushing that happens in reduction. Nice glaze,
though. I think it is in his workbook, though I may have
it from a different source - can't remember offhand.
regards
Dannon Rhudy
---
---
Steve Slatin on tue 21 mar 06
Dannon --
I just did a quick flip-through of the VC
workbook, and if it's there it's not with the
other mid-fire glazes (i.e., between pps 114 and
143). If you have it at hand, could you post/send
me a copy?
(I know someone who knows someone who just got a
giant gas kiln and wants members for cooperative
firing; will do alternate ^6 and ^10 firings so I
don't even need to change clays, just get some
good reduction glazes ranged in ...)
-- Steve Slatin
--- Dannon Rhudy wrote:
> .........sent it to Ron Roy. I want to tweak
> it to work at ^6 oxidation.
> ............
>
> Val Cushing has already made a cone 6 version
> of
> this glaze. Looks very good in oxidation, but
> none of
> the blushing that happens in reduction. Nice
> glaze,
> though. I think it is in his workbook, though
> I may have
> it from a different source - can't remember
> offhand.
>
> regards
>
> Dannon Rhudy
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Rikki Gill on tue 21 mar 06
Dannon,
Would you mind just posting to the list? I was about to call Bacia about
how to buy Val Cushing's glaze book, because I would like the cone ten
version.
Thanks,
Best, Rikki
----- Original Message -----
From: "Steve Slatin"
To:
Sent: Tuesday, March 21, 2006 10:38 AM
Subject: Re: AA Copper glaze
> Dannon --
>
> I just did a quick flip-through of the VC
> workbook, and if it's there it's not with the
> other mid-fire glazes (i.e., between pps 114 and
> 143). If you have it at hand, could you post/send
> me a copy?
>
> (I know someone who knows someone who just got a
> giant gas kiln and wants members for cooperative
> firing; will do alternate ^6 and ^10 firings so I
> don't even need to change clays, just get some
> good reduction glazes ranged in ...)
>
> -- Steve Slatin
>
> --- Dannon Rhudy wrote:
>
>> .........sent it to Ron Roy. I want to tweak
>> it to work at ^6 oxidation.
>> ............
>>
>> Val Cushing has already made a cone 6 version
>> of
>> this glaze. Looks very good in oxidation, but
>> none of
>> the blushing that happens in reduction. Nice
>> glaze,
>> though. I think it is in his workbook, though
>> I may have
>> it from a different source - can't remember
>> offhand.
>>
>> regards
>>
>> Dannon Rhudy
>
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Dannon Rhudy on tue 21 mar 06
> Rikki said:
> .......Would you mind just posting to the list?.......
No, don't mind, glad to. But it's at the studio, and I am
at home being happily snowed in for what is likely the
last time this year. What an extraordinary day, six inches
of snow plus drifts. This is a day for fires in the fireplace,
soup simmering on the stove, and bread baking in the
oven. Even adults need an occasional "snow day".
Maybe ESPECIALLY adults ........
regards
Dannon Rhudy, enjoying the deer ambling across the
meadow, indifferent to the pair of foxes watching them
from the edge of the pond. A pair of Canada geese are
equally indifferent, swimming with along with great dignity,
impervious to threat from fox or coyote.
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