Joyce Lee on fri 20 apr 01
Meticky Liz said:
> Then I went to 1940 F, soaking an
> hour, and 1950 for 1 1/2 hours. The color did improve, on the inside
> quite orange, on the outside, GOLD, glaze was shinier, less crazing,
> and the carbon trapping on some had a smooth pebbly surface. My clay
> is porcelain, glaze fired in propane to c/10,11.
I, too, found several refired shino pots with GOLD on the outside,
orange on the inside (and the fine crazing having disappeared) when I
soaked at approximately 1940F for an hour before going to ^11 plus.
These were all in one load of refires; I haven't achieved that look
since. The GOLDs had a mellow, almost woodfired appearance. The carbon
trapping that had been on the rims of the bowls before refiring was
mellower, too, unfortunately.... more of a dark gray than the black that
had been there. The glaze was Mel's with double the soda ash; the
claybody was Coleman's porcellaneous from Aardvark. Usually with Mel's
glaze (with double the soda ash) I get oranges on brown clay, but on the
Coleman's it's always middish gray with lots of dark gray to black
carbon trapping... looks striking with Pinnell's red PUDDLED on the
bottom of flared bowls... dark BloodRuby RED with carbon trapping
showing through, not that cranberry red that I don't particularly like.
Don't know what happened that caused the GOLD and most potters (gurus)
have discounted my report ... so I am very pleased to hear about your
experience, Meticky.
Joyce
In the Mojave not liking to be discounted, but accepting that that's my
role for the nonce. AND thinking maybe I won't get to Oregon after
all... #1 Support Person isn't doing all that well right now.... okay,
but not great.... sooo to you much admired Oregon Clayarters... another
time..... for sure... I know the show will be beyond fantabulous....
Hank Murrow on sat 21 apr 01
Joyce wrote;
>I, too, found several refired shino pots with GOLD on the outside,
>orange on the inside (and the fine crazing having disappeared) when I
>soaked at approximately 1940F for an hour before going to ^11 plus.
>These were all in one load of refires; I haven't achieved that look
>since. The GOLDs had a mellow, almost woodfired appearance. The carbon
>trapping that had been on the rims of the bowls before refiring was
>mellower, too, unfortunately.... more of a dark gray than the black that
>had been there. The glaze was Mel's with double the soda ash; the
>claybody was Coleman's porcellaneous from Aardvark.
> Don't know what happened that caused the GOLD and most potters (gurus)
>have discounted my report ... so I am very pleased to hear about your
>experience, Meticky.
Dear Joyce;
I think that the gold effect is due to a preponderance of soda migration to
the outside surface of the pot. Try wrapping the outside with saran,
forcing the migration to the inside of the pot, and see if you get gold on
the inside.
Another thing to try might be to do a gradual addition of kaolin to your
glaze in several steps to see where the carbon trapping dissappears and the
reddish color comes on strong.
Hank in Eugene
Kathy McDonald on tue 24 apr 01
I have been following these threads about shinos,,,and YES,,,,,I have
had shinos develope a metallic
cast on the outside of some pots,,,,,,they seem to do this when
fired high ( c 11 or better) with copper glazes in the same kiln load,..
Just an observation,,,but maybe it has to do with the copper.
Kathy...NOT a guru,,,just an observer of pots for 25 yrs.
http:www.willowtreepottery.com
Joyce Lee wrote:
> Meticky Liz said:
>
>> Then I went to 1940 F, soaking an
>> hour, and 1950 for 1 1/2 hours. The color did improve, on the inside
>> quite orange, on the outside, GOLD, glaze was shinier, less crazing,
>> and the carbon trapping on some had a smooth pebbly surface. My clay
>> is porcelain, glaze fired in propane to c/10,11.
>
>
> I, too, found several refired shino pots with GOLD on the outside,
> orange on the inside (and the fine crazing having disappeared) when I
> soaked at approximately 1940F for an hour before going to ^11 plus.
> These were all in one load of refires; I haven't achieved that look
> since. The GOLDs had a mellow, almost woodfired appearance. The carbon
> trapping that had been on the rims of the bowls before refiring was
> mellower, too, unfortunately.... more of a dark gray than the black that
> had been there. The glaze was Mel's with double the soda ash; the
> claybody was Coleman's porcellaneous from Aardvark. Usually with Mel's
> glaze (with double the soda ash) I get oranges on brown clay, but on the
> Coleman's it's always middish gray with lots of dark gray to black
> carbon trapping... looks striking with Pinnell's red PUDDLED on the
> bottom of flared bowls... dark BloodRuby RED with carbon trapping
> showing through, not that cranberry red that I don't particularly like.
>
> Don't know what happened that caused the GOLD and most potters (gurus)
> have discounted my report ... so I am very pleased to hear about your
> experience, Meticky.
>
> Joyce
> In the Mojave not liking to be discounted, but accepting that that's my
> role for the nonce. AND thinking maybe I won't get to Oregon after
> all... #1 Support Person isn't doing all that well right now.... okay,
> but not great.... sooo to you much admired Oregon Clayarters... another
> time..... for sure... I know the show will be beyond fantabulous....
>
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