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I just noticed that one of my larger F1 ZiNi pots has a little crack on the lid. The clay looks similar to the other one. So F1 pots with "black bone" do not seem to be that rare after all (given that this is really black bone and not just odd clay).

Balthazar wrote: ↑

Mon Jun 29, 2020 2:44 pm

Hmm You might be thinking of Xuanxue? There's been lots of attempts to unify, or at least find complimentary aspects, of different philosophies throughout history, some more successful than others. I don't know much about the details here so I'll listen to the natives,e.g. Youzi

I'm just a Ruist.

@Hmm Sure later, the three main ideologies somehow merged and lived in Harmony, making the foundation for Chinese Culture, but at the beginning in Confucius and Lao Zi's time (They lived during the same time), they and their groups were quite against each other.
The Ruists seek to change the world through benevolent actions and meritocracy, while the Daoist were mainly on the side of let things go their way, what happens gonna happen.

But, I'm not a Daoist, so I'm not sure exactly of that side of the question.

And I don't want to steer the topic away. So my analogy was to:
The Ruist takes care of the their teapot, cleaning it, to keep it in a good state, while the Daoist just lets it get dirty, cuz it's gonna get dirty anyway, and that's just the way it is, don't try to go agains the way.

Mark-S wrote: ↑

Mon Jun 29, 2020 4:18 pm

I just noticed that one of my larger F1 ZiNi pots has a little crack on the lid. The clay looks similar to the other one. So F1 pots with "black bone" do not seem to be that rare after all (given that this is really black bone and not just odd clay).

That looks more dark brown to me, not black bone.

Youzi wrote: ↑

Mon Jun 29, 2020 4:20 pm

That looks more dark brown to me, not black bone.

It's not black but also definitely not brown. I would describe the color as slate grey. Is this normal for some ZiNi?

Mark-S wrote: ↑

Mon Jun 29, 2020 4:27 pm

Youzi wrote: ↑

Mon Jun 29, 2020 4:20 pm

That looks more dark brown to me, not black bone.

It's not black but also definitely not brown. I would describe the color as slate grey. Is this normal for some ZiNi?

yeah, in my opinion it's "Brown enough". Zini has like 50 shades for brown, gray, purplish, reddish orangey colors. So I'd say it falls under those.

@Youzi

Slate grey is not really a brown shade to me but if that's normal... thank you - mystery solved. In this case the other pot is also most likely "normal" ZiNi and not black bone, because the color was slate grey too (if I remember correctly).

Mark-S wrote: ↑

Mon Jun 29, 2020 4:40 pm

Youzi

Slate grey is not really a brown shade to me but if that's normal... thank you - mystery solved. In this case the other pot is also most likely "normal" ZiNi and not black bone, because the color was slate grey too (if I remember correctly).

Maybe the color is different in real life. I can only look at the picture on two different screens which is both dark, grayish brown. Or it could just be that we refer to the same colors with different names.

@Mark-S

This is black bone. I don’t see anything remotely similar going on with your pot.

Chadrinkincat wrote: ↑

Mon Jun 29, 2020 5:55 pm

Mark-S

This is black bone. I don’t see anything remotely similar going on with your pot.

Thanks for the photo. When I asked about my other pot it wasn't that clear: viewtopic.php?f=19&t=18&p=25309&hilit=Black+bone#p25309

It's very hard to get a right photo of it with a mediocre smartphone. Unfortunately, I don't have a camera at the moment. But I think you are right and it's just the clay itself. At least I have not seen a greyish black bone yet. The examples from you and Bok are all black.

Mark-S wrote: ↑

Mon Jun 29, 2020 4:27 pm

Youzi wrote: ↑

Mon Jun 29, 2020 4:20 pm

That looks more dark brown to me, not black bone.

It's not black but also definitely not brown. I would describe the color as slate grey. Is this normal for some ZiNi?

It’s really simple: if a magnet sticks to your Yixing pot it has black bones. If it doesn’t it’s not.

Other than that it’s jet black, think shiny raven feathers black. I have one magnetic pot that is a reduction fired Duanni from LQER that is orange green. So technically not black bones but same result.

Mark-S wrote: ↑

Mon Jun 29, 2020 6:11 pm

Chadrinkincat wrote: ↑

Mon Jun 29, 2020 5:55 pm

Mark-S

This is black bone. I don’t see anything remotely similar going on with your pot.

Thanks for the photo. When I asked about my other pot it wasn't that clear: viewtopic.php?f=19&t=18&p=25309&hilit=Black+bone#p25309

It's very hard to get a right photo of it with a mediocre smartphone. Unfortunately, I don't have a camera at the moment. But I think you are right and it's just the clay itself. At least I have not seen a greyish black bone yet. The examples from you and Bok are all black.

The point is that because of temporary reduction environment iron in the clay ( red hematite or yellow hydroxide ) turns into black iron (magnetite), which is slightly magnetic.

@Youzi not only slightly, I got one where the magnet jumps right to the pot!

Can’t explain though why my reduction fired Duanni is magnetic, it’s not black inside at all, but a greenish orange. Pot itself is a dark green grey with some orangey areas.

@Bok

Youzi wrote: ↑

Tue Jun 30, 2020 4:37 am

The point is that because of temporary reduction environment iron in the clay ( red hematite or yellow hydroxide ) turns into black iron (magnetite), which is slightly magnetic.

Yeah, and I thought that because in ZiNi is less iron than in Zhuni for example, the clay does not have do be black like yours. Apparently this was a bad assumption. So I'll just remember: black bones = black & magnetic

Thanks for your help

Bok wrote: ↑

Tue Jun 30, 2020 5:02 am

Youzi not only slightly, I got one where the magnet jumps right to the pot!

Can’t explain though why my reduction fired Duanni is magnetic, it’s not black inside at all, but a greenish orange. Pot itself is a dark green grey with some orangey areas.

What kind of magnet though? Because duanni also has some iron content.

Take Lüni as an example, which has the least amount of iron. If you fire it in reduction environment it'll turn gray, even though it has around 1-2% iron.

Mark-S wrote: ↑

Tue Jun 30, 2020 5:25 am

Bok

Youzi wrote: ↑

Tue Jun 30, 2020 4:37 am

The point is that because of temporary reduction environment iron in the clay ( red hematite or yellow hydroxide ) turns into black iron (magnetite), which is slightly magnetic.

Yeah, and I thought that because in ZiNi is less iron than in Zhuni for example, the clay does not have do be black like yours. Apparently this was a bad assumption. So I'll just remember: black bones = black & magnetic

Thanks for your help

Zini has around 6-8% iron Hongni 8-12%, zhuni 12-22%. Da hong Pao zhuni, based on how meticulous is the selection, should be around 20%. But the definition is not clear with that one.