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Mar 28th, '09, 18:29
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Yixing Pot as a Kettle?

by bi lew chun » Mar 28th, '09, 18:29

Reading through this site posted by hop_goblin a while back, I came across a few interesting things about zisha as a material for boiling water:
Zisha wares, before it became works of art, was traditionally used for boiling water and cooking. These wares are unlike what we have today and does not have any chop marks.
Now, my tip for this session is not to use any of the above boiling appliances [metal or glass kettle] but instead use a Yixing Zisha teapot to boil the water. The difference or improvement is just plain fantastic! Your tea taste sweeter and have more substance than before. Alternatively, instead of using a teapot, buy a zisha clay kettle to boil water. Your tea is guaranteed to taste different, but how much different will depend on the water used. I recommmend using normal chlorinated tap water for best results.
Although my filtered water tastes fine, I'd like to improve the way it interacts with tea, especially when using a gaiwan. I'm looking to move away from stainless steel, not quite prepared to plunk down big money on volcanic stoneware or a Purion kettle, and not really interested in adding charcoal bamboo to an electric kettle.

I was thinking of something along the lines of this, though I'd lose the warmer and use it on a gas burner or standalone hot plate (assuming, of course, there isn't something wrong or dangerous about this type of setup).

Image

Any thoughts or experiences?

Mar 28th, '09, 19:59
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by Intuit » Mar 28th, '09, 19:59

Buy a small unglazed clay kettle - redware if possible, because you want the iron content to 'smooth' soft water (impacts a small bit of minerals and may oxidize organic acids naturally present in some soft river water supplies).

Or, you can add mineral stones made for this purpose to your kettle. I have no idea of the nature of these mineral 'boiling stones', but we use them in labs to keep water from bumping a container when boiling in pyrex glassware. I've seen them mentioned a few times in TC threads.

Edit: yes, that's what I had in mind - the page didn't load fully with photo before I added my reply. Where did you get it? It's what I've been looking for - the others found weren't redware, but were reddish clays with a lot of sand in the clay matrix.

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Mar 28th, '09, 20:58
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by bi lew chun » Mar 28th, '09, 20:58

Chinese Teapot Gallery. They have a few of these larger (800-1000 mL), bamboo-handled pots in various clays (or simply colored clay). I have no idea of their quality, and I'm not sure whether these are among CTG's worthwhile pots or not.

The shape appears quite similar to Lin's Purion kettles, but apart from material, which is obviously different, there could be huge differences in construction, thickness, etc. that would make these unsuitable for boiling water. They are intended to be warmed over what looks like an oil lamp, so it may be that they could readily tolerate the flame of a gas range or alcohol burner. I really don't know.

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by Intuit » Mar 28th, '09, 21:58

The Teapot Gallery's owners apparently have an overful inbox; repeated attempts to contact them by email failed.

You can heat zisha clay pots on the stove at a low boil. The volume of the pot you picture suggests that it's not a teapot, but a kettle (the 'stove' might be adapted for a little electric ring burner, making it work keeping).

Might be worth a try. Unsure of the quality of the clay; high fired would be better for a kettle with respect to durability and heat tolerance.

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by MarshalN » Mar 28th, '09, 22:03

Is it safe to put it directly on a gas stove fire? Not sure, just asking.

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by bi lew chun » Mar 28th, '09, 22:42

Intuit wrote:The volume of the pot you picture suggests that it's not a teapot, but a kettle (the 'stove' might be adapted for a little electric ring burner, making it work keeping).
It certainly looks like a kettle, anyway. I'd like to get a look at the bottom and thickness of the clay.
Intuit wrote:Might be worth a try. Unsure of the quality of the clay; high fired would be better for a kettle with respect to durability and heat tolerance.
It might, but the quality and heat-tolerance of the clay are pretty big ifs. Hopefully someone will have some first-hand experience, either with these particular pots or boiling in Yixing in general.
MarshalN wrote:Is it safe to put it directly on a gas stove fire? Not sure, just asking.
That's what I'm hoping someone else can tell me. I'd rather not have to pick Yixing shrapnel out of my cat to find out.

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Mar 28th, '09, 23:12
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by sp1key » Mar 28th, '09, 23:12

if its really yixing, its a porous material and susceptible to expand due to heat and shrink due to cold.
I know for yixing teapot if the weather's been cold or low room temperature and boiling hot water is poured into the teapot, cracks could happen its not uncommon therefore I would think its the same for a yixing pot?
or maybe its mixed with some other material?

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by bi lew chun » Mar 28th, '09, 23:56

sp1key wrote:if its really yixing, its a porous material and susceptible to expand due to heat and shrink due to cold.
I know for yixing teapot if the weather's been cold or low room temperature and boiling hot water is poured into the teapot, cracks could happen its not uncommon therefore I would think its the same for a yixing pot?
or maybe its mixed with some other material?
As far as I know, it is a teapot, just a very large one that includes a base for some type of warmer. I guess the question is whether a Yixing teapot is heat-resistant enough to function as a kettle, i.e., can it tolerate not only the heat of boiling water, but the temperature of the flame that causes the boil.

I'm not clear on whether this applies to the new Purion models as well, but according to Lin's catalog, their regular kettles can be used with an alcohol burner, charcoal, or a gas stove. Still not sure how the material/firing temperature of their clay compares with zisha, though.

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Mar 29th, '09, 00:35
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by wyardley » Mar 29th, '09, 00:35

One of my Yixing books (forget which one) mentions that larger Yixing with mounts for a separate handle with hooks were intended for boiling water. I don't think this is frequently done now, but would imply that at least some Yixing pots should be able to handle the heat.

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by Oni » Mar 29th, '09, 04:12

It is a lot cheaper than lin`s purion kettle, that costs 193 + shipping, and those so called yixing kettles cost 35 + 12 shipping. It just doesn`t feel right, lin`s purion clay, now I read about that, and it is a company with prestige in the bussiness, but nowdays not everything is yixing that is called yixing, but I must say the price is tempting.

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by bi lew chun » Mar 29th, '09, 04:55

wyardley wrote:One of my Yixing books (forget which one) mentions that larger Yixing with mounts for a separate handle with hooks were intended for boiling water. I don't think this is frequently done now, but would imply that at least some Yixing pots should be able to handle the heat.
Corroboration! Thank you.
Oni wrote:It is a lot cheaper than lin`s purion kettle, that costs 193 + shipping, and those so called yixing kettles cost 35 + 12 shipping. It just doesn`t feel right, lin`s purion clay, now I read about that, and it is a company with prestige in the bussiness, but nowdays not everything is yixing that is called yixing, but I must say the price is tempting.
I think they're $35 because they're not real kettles, and are likely to explode over any flame hotter than a warming lamp. I could be wrong. Actually I'm hoping I am, but after a trip to the ER for scalding my hand, I'm not keen on doing much experimentation until I know a bit more.

Hou De has an earthenware kettle for around $65. Might not be on par with Lin's, but it would probably be a much safer option than one of these "kettles."

Hopefully Chinese Tea Gallery will reply and provide some more detailed information and pictures. Perhaps then Lin's kettle owners could weigh in on any similarities or differences in construction, especially with regard to the base (meaning bottom of the kettle, not the thing it sits on).

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by Intuit » Mar 29th, '09, 11:47

Hou De also had an unglazed earthenware kettle that I had my eye on, until they removed it from the website about 6 weeks ago.

The one they carry now is glazed; it will not serve our purpose in improving the taste of brewing water.

I also found this one, but it's also glazed.

http://www.imperialtea.com/Large-Earthe ... e-P86.aspx

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Mar 29th, '09, 12:12
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by Oni » Mar 29th, '09, 12:12

That is Lin`s kettle there, but it is not purion, and Dragon teahouse has a set but for 275$, a bit too much.

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by MarshalN » Mar 29th, '09, 14:31

Indeed, I'd be worried just because if there's a minor defect in the "kettle", a quick heating through gas stove or whatever could result in a nasty break/explosion. You don't want that.

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by Oni » Mar 29th, '09, 15:45

I saw that funalliance has huge yixing teapots that look like kettle, like this one
http://funalliance.com/tea/htm/teapot/870901638.htm , it can hold 1200 ml.

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