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TeaTotaling wrote: ↑

Mon Dec 21, 2020 1:00 pm

This pot is made from Min Guo Lüni, and has a similar blueish appearance to Kolleh’s.

Yes, "Min Guo Lv Ni" is cobalt-oxide added clay, it is not a natural ore.

DailyTX wrote: ↑

Mon Dec 21, 2020 1:15 pm

Anyone know if later F1 have any fire reduction pots? Here is a pot from F1 in late 80s early 90s. I think it may be magnesium oxide. What do you think?

I think this is manganese oxide possibly with some cobalt oxide as well. F1 did not use reduction firing to my knowledge.

Youzi wrote: ↑

Mon Dec 21, 2020 9:19 am

Oh, and there isn't naturally blue or green clay in yixing, never existed. Those are made with added cobalt or chromium oxide.

Are you saying there's no green zhuni either?
https://taiwanoolongs.com/collections/a ... i-chu-fang

.m. wrote: ↑

Mon Dec 21, 2020 1:34 pm

Youzi wrote: ↑

Mon Dec 21, 2020 9:19 am

Oh, and there isn't naturally blue or green clay in yixing, never existed. Those are made with added cobalt or chromium oxide.

Are you saying there's no green zhuni either?
https://taiwanoolongs.com/collections/a ... i-chu-fang

Definitely there's no green zhuni.

Zhuni is reddish, orangy of brownish. Or black when reduction fired.

Unless there is green iron oxide existing

steanze wrote: ↑

Mon Dec 21, 2020 1:26 pm

TeaTotaling wrote: ↑

Mon Dec 21, 2020 1:00 pm

This pot is made from Min Guo Lüni, and has a similar blueish appearance to Kolleh’s.

Yes, "Min Guo Lv Ni" is cobalt-oxide added clay, it is not a natural ore.

Understood, makes perfect sense. Thanks @steanze

TeaTotaling wrote: ↑

Mon Dec 21, 2020 2:04 pm

Understood, makes perfect sense. Thanks steanze

welcome!

steanze wrote: ↑

Mon Dec 21, 2020 1:28 pm

DailyTX wrote: ↑

Mon Dec 21, 2020 1:15 pm

Anyone know if later F1 have any fire reduction pots? Here is a pot from F1 in late 80s early 90s. I think it may be magnesium oxide. What do you think?

I think this is manganese oxide possibly with some cobalt oxide as well. F1 did not use reduction firing to my knowledge.

@steanze
Thank you for confirming.

DailyTX wrote: ↑

Mon Dec 21, 2020 5:57 pm

steanze
Thank you for confirming.

Welcome!

Youzi wrote: ↑

Mon Dec 21, 2020 1:40 pm

.m. wrote: ↑

Mon Dec 21, 2020 1:34 pm

Youzi wrote: ↑

Mon Dec 21, 2020 9:19 am

Oh, and there isn't naturally blue or green clay in yixing, never existed. Those are made with added cobalt or chromium oxide.

Are you saying there's no green zhuni either?
https://taiwanoolongs.com/collections/a ... i-chu-fang

Definitely there's no green zhuni.

Zhuni is reddish, orangy of brownish. Or black when reduction fired.

Unless there is green iron oxide existing

I’ve seen a modern reduction fired Zhuni which was a very dark blue ish black. Some could call it dark blue

Apparently that was done in limited amounts but abandoned due to the high failure rate.

This is an antique, probably Qinghuini at the base and has undergone some kiln changes and is blueish in spots.

Teapot two! Which was actually the first one I bought, in person at a small shop in Suzhou. I didn't even know there were differences between the types of clay at the time, but I've since tentatively decided this must be duanni if anything.

I'm pretty sure it's got to be at least partly handmade, since the spout is crooked.

Do let me know if you need another picture because these ones aren't enough/are out of focus. And thank you everyone for your help so far.

@Kolleh
It looks like duanni alright. The shape is call xishi, I heard it’s the most common locomotive shape. The lines on the inner side wall look like scratches...intentionally faking tool marks?

Bok wrote: ↑

Mon Dec 21, 2020 6:57 pm

This is an antique, probably Qinghuini at the base and has undergone some kiln changes and is blueish in spots.

Very nice, thanks for sharing.

.m. wrote: ↑

Tue Dec 22, 2020 2:07 am

Bok wrote: ↑

Mon Dec 21, 2020 6:57 pm

This is an antique, probably Qinghuini at the base and has undergone some kiln changes and is blueish in spots.

Very nice, thanks for sharing.

Thanks! It’s very good at brewing aged Oolongs.

TeaTotaling wrote: ↑

Mon Dec 21, 2020 1:00 pm

This pot is made from Min Guo Lüni, and has a similar blueish appearance to Kolleh’s.

@TeaTotaling soooooo you’re the lucky one who snatched this pot!