What Pu'er Are You Drinking

Puerh and other heicha
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Stephen
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Sun Sep 20, 2020 5:43 pm

2020 'Forest Tea' sheng puer from YS. Elegant and balanced, just what I like!
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Bok
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Location: Taiwan

Sun Sep 20, 2020 7:28 pm

Stephen wrote:
Sun Sep 20, 2020 5:43 pm
2020 'Forest Tea' sheng puer from YS. Elegant and balanced, just what I like!
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Careful with those cups, these red ones leach lead.
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Stephen
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Location: Bay Area, California

Sun Sep 20, 2020 10:59 pm

Bok wrote:
Sun Sep 20, 2020 7:28 pm
Careful with those cups, these red ones leach lead.
Oh really? Thanks for the warning. I had wondered, but never lead tested these. I rarely use this set. Is it all cups in this style or this glaze color?
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Bok
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Sun Sep 20, 2020 11:34 pm

Stephen wrote:
Sun Sep 20, 2020 10:59 pm
Bok wrote:
Sun Sep 20, 2020 7:28 pm
Careful with those cups, these red ones leach lead.
Oh really? Thanks for the warning. I had wondered, but never lead tested these. I rarely use this set. Is it all cups in this style or this glaze color?
Basically, all red glazed antique cups are very likely to leach lead, this style in particular almost 100%.
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Stephen
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Location: Bay Area, California

Sun Sep 20, 2020 11:55 pm

Bok wrote:
Sun Sep 20, 2020 11:34 pm
Basically, all red glazed antique cups are very likely to leach lead, this style in particular almost 100%.
Got it, thank you. I try to be cautious with gold rim or red cups and just use them occasionally. I'll lead test these and see what comes up. I like these cups, but don't use them but once or twice a year.
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Iizuki
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Mon Sep 21, 2020 1:08 am

Balthazar wrote:
Sun Sep 20, 2020 11:38 am
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I'd be wary of that ancient terror lurking in the dark depths of your puer.. 🐙

That being said, Changtai 65th is great stuff! I have a cake from KTM.
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klepto
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Mon Sep 21, 2020 1:15 am

Iizuki wrote:
Mon Sep 21, 2020 1:08 am
Balthazar wrote:
Sun Sep 20, 2020 11:38 am
Image
I'd be wary of that ancient terror lurking in the dark depths of your puer.. 🐙

That being said, Changtai 65th is great stuff! I have a cake from KTM.
How am I going to go to sleep tonight with talk of such horrors? :cold_sweat:
faj
Posts: 454
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Location: Quebec

Mon Sep 21, 2020 6:22 am

Bok wrote:
Sun Sep 20, 2020 11:34 pm
Basically, all red glazed antique cups are very likely to leach lead, this style in particular almost 100%.
I have seen mentions all over the place that bright colors tend to be associated with the presence of heavy metals, and the conventional wisdom is that anything over the glaze is more likely to leach.

However, my understanding is that clear glazes also typically contains lead (not just on antiques), for the same reason crystal glass is loaded with lead : its optical properties. I would welcome anyone better informed about pottery to correct me on that. Maybe clear glaze is safer because it tends to leach less than pigments, and maybe there are glazes that are free from heavy metals, but I can't say I feel able to say with any certainty that any given item is safe for long-term use.
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OCTO
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Location: Penang, Malaysia

Mon Sep 21, 2020 6:22 am

klepto wrote:
Mon Sep 21, 2020 1:15 am
Iizuki wrote:
Mon Sep 21, 2020 1:08 am
Balthazar wrote:
Sun Sep 20, 2020 11:38 am
Image
I'd be wary of that ancient terror lurking in the dark depths of your puer.. 🐙

That being said, Changtai 65th is great stuff! I have a cake from KTM.
How am I going to go to sleep tonight with talk of such horrors? :cold_sweat:
Use simple plain white cups..... problem free, worry free, lead free... hahahahaha.....
faj
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Location: Quebec

Mon Sep 21, 2020 6:32 am

OCTO wrote:
Mon Sep 21, 2020 6:22 am
Use simple plain white cups..... problem free, worry free, lead free... hahahahaha.....
Is that so? As commented above, my understanding is that clear glazes are (or can be) lead-based.
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StoneLadle
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Location: Malaysia

Mon Sep 21, 2020 6:39 am

Quick everyone, throw out all your mugs, plates and bowls...
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wave_code
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Location: Germany

Mon Sep 21, 2020 7:52 am

Has anyone tried any Changtai ripes? It clearly isn't their focus as I've seen only 2 or 3 of them, but I'm curious if they are distinctive in any way that might make worth trying them out.

Drinking some Bitter Leaf "Red Star" 7581. Surprisingly my first time trying out a version of this classic. All around pretty pleasant, very clean, but also kind of not that interesting to me. Maybe the 7581 isn't my thing, or maybe I need to try out some different versions/storage.
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Stephen
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Location: Bay Area, California

Mon Sep 21, 2020 11:54 am

@faj If all clear glazes had leachable lead that would certainly be a worldwide health issue. There should be some governmental resources on the interwebs with more info on that. You could also check out posts by "JBaymore" on the old Teachat. He's a ceramics professor with great insight.
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StoneLadle
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Location: Malaysia

Mon Sep 21, 2020 12:08 pm

@wave_code with regards to the 7581 bricks no matter what they say, are over cooked, anything post 90s anyways and even with cakes labelled as such it's best to try before committing. Time would help, air also... Break the brick up, air it out wrapped in kitchen paper somewhere dark and neutral smelling for a week or so and then pop the lot into a can or porcelain (I think clay works good for cooked stuff but it's a quirk) for a week a so and see what happens it's okay too to forget and go wow later on but it's fun...

The pre 2000 stuff was much gentler in terms of cooking and had chopped old Sheng leaves and stems mixed in. I have a couple bricks going at once. One in clay for about ten years now, opened back in 2008 or so and dated mid 90s, that one is going real good, so I've been restraining...

These bricks have been somewhat of an obsession of mine from the get go back in the early 2000s and they still get me...

Several factories had a go at them and the Menghai ones as usual, are prized because they seem to be either completely Sheng sometimes, or i reckon made from old Sheng leaf crushed in hard with the lightly cooked stuff, and are really delightful...
faj
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Location: Quebec

Mon Sep 21, 2020 1:37 pm

Stephen wrote:
Mon Sep 21, 2020 11:54 am
faj If all clear glazes had leachable lead that would certainly be a worldwide health issue.
At one point, paint and fuel were huge sources of exposure to lead. And it was not an issue, until it was. Lead being widely present in the environment due to pollution, it is difficult to evaluate the exposure level due to any specific source. This reduces the likelihood of further actions for sources of exposure that have lower average impact but may still have high impact for specific individuals.

Crystal glass is a known, legal way to add lead to your drinks, and studies have demonstrated that prolonged exposure to acidic liquids will provide you with quite a dose of lead. Strangely, manufactures of crystal items still seem to advertise on the basis that higher lead content means a more desirable product. Go figure.
Stephen wrote:
Mon Sep 21, 2020 11:54 am
There should be some governmental resources on the interwebs with more info on that.
That is what I thought, too. In the not-too-distant past, I tried to find information about this, but was not successful. I am no expert at locating that kind of information, though. All I found were anecdotal evidence of lead leaching from terra cotta items from Mexico, probably all referencing the same study to begin with.

About pottery, I found various mentions of the use of frits for glazes as something that made leaded glaze safer for workers using them at the manufacturing stage, but this has nothing to do with safety for the end-user.
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