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Apr 2nd, '09, 21:54
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by MarshalN » Apr 2nd, '09, 21:54

I've seen some variation of this kind of pot, and it can boil very slowly. I don't know if it was the problem with the induction plate or the kettle.

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Apr 3rd, '09, 00:05
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by Tead Off » Apr 3rd, '09, 00:05

I think most tea drinkers would not use glass for a kettle. The idea of using the tetsubin is to change the structure of the water because of the iron content giving a better flavor to certain teas when brewing. And, you can use a tetsubin with induction heat. Of course, you can use glass, but, watch out for the tea gestapo! :lol:

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by odarwin » Apr 3rd, '09, 00:10

ive used one, very similar to that one, but our maid broke it.
so now i use a tetsubin.

pros: no metal surface contact with water, no rust no fuzz. no metallic taste or smell in the water.

cons: boils very slowly, i had a .8L one, it takes 10-15 min for room temp water to reach a boil

hope this helps
-darwin

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by hooksie » Apr 3rd, '09, 00:10

Tead Off wrote:I think most tea drinkers would not use glass for a kettle. The idea of using the tetsubin is to change the structure of the water because of the iron content giving a better flavor to certain teas when brewing. And, you can use a tetsubin with induction heat. Of course, you can use glass, but, watch out for the tea gestapo! :lol:
Someone posted a link here pointing out that induction heating causes recurring stress to specific points of a pot due to the nature of the technology's rapid heating; it effectively warned against using any nice tetsubin with an induction kettle.
We were fated to pretend.

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by Tead Off » Apr 3rd, '09, 00:14

hooksie wrote:
Tead Off wrote:I think most tea drinkers would not use glass for a kettle. The idea of using the tetsubin is to change the structure of the water because of the iron content giving a better flavor to certain teas when brewing. And, you can use a tetsubin with induction heat. Of course, you can use glass, but, watch out for the tea gestapo! :lol:
Someone posted a link here pointing out that induction heating causes recurring stress to specific points of a pot due to the nature of the technology's rapid heating; it effectively warned against using any nice tetsubin with an induction kettle.
Could be true but not all induction heaters are constructed the same way. I think it needs more research.

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by wyardley » Apr 3rd, '09, 01:51

I think most tea drinkers would not use glass for a kettle.
I use a completely glass (non-induction) kettle, and I've used a glass kettle with a metal base (also non-induction) in the past. For me, the biggest drawback is the slow boil (which many people agree is not ideal for water, and of course it's also a little test of one's patience at times) -- about 15-20 minutes to bring 3/4 of the kettle to a boil after the hot plate is completely warmed up. I assume this is because all of the heat is coming from one part of the kettle, whereas a kettle that conducts / retains heat more would heat the water faster. I assume the induction one would be faster than these other kinds, but I don't know by how much.

Image

I can think of a number of people who know a lot more than I do about tea who use and / or recommend glass kettles. Best Tea House in HK (and Canada), Tea Gallery in NY, I believe Wisteria Teahouse in Taipei uses them, etc. etc.

I think most tea drinkers use stainless steel and / or plastic kettles, and in comparison to those, glass has some advantages. Glass kettles are also fairly practical (don't rust), fairly light and easy to handle, and make it easy to see exactly what the water is doing. An earthenware or iron kettle will probably retain heat longer than glass, which I would say is good in some situations, maybe not as good in others.

I think it's safe to say that a glass kettle is unlikely to improve the water, but on the other hand, it's also pretty safe to say it won't hurt it. And you can use things like bamboo charcoal, gypsum, maifan stones, broken up teapots, etc. if you want to try to improve the flavor of the water.

Image

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by TIM » Apr 3rd, '09, 01:58

Nice set up you have there Wyardley. Shall I say, very Best Tea House ish :wink: Clean and easy to see what the water is doing.

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by Tead Off » Apr 3rd, '09, 05:52

wyardley wrote:
I can think of a number of people who know a lot more than I do about tea who use and / or recommend glass kettles. Best Tea House in HK (and Canada), Tea Gallery in NY, I believe Wisteria Teahouse in Taipei uses them, etc. etc.

I think most tea drinkers use stainless steel and / or plastic kettles, and in comparison to those, glass has some advantages. Glass kettles are also fairly practical (don't rust), fairly light and easy to handle, and make it easy to see exactly what the water is doing. An earthenware or iron kettle will probably retain heat longer than glass, which I would say is good in some situations, maybe not as good in others.

I think it's safe to say that a glass kettle is unlikely to improve the water, but on the other hand, it's also pretty safe to say it won't hurt it. And you can use things like bamboo charcoal, gypsum, maifan stones, broken up teapots, etc. if you want to try to improve the flavor of the water.

Image
There are always exceptions but think about why a teashop would use a glass kettle if what you say is true about it being a very slow way to heat water. Doesn't make sense to me as it would cost more for the shop to use and waiting time for customers would be greater. Maybe these shops are pushing glass kettles. They can be very attractive as yours is. OTOH, if you're using a red clay teapot for your oolongs, it won't matter what the water was boiled in as it will change its flavor and aroma. :D Happy brewing!

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Apr 3rd, '09, 06:54
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by Herb_Master » Apr 3rd, '09, 06:54

Tead Off wrote:I think most tea drinkers would not use glass for a kettle. The idea of using the tetsubin is to change the structure of the water because of the iron content giving a better flavor to certain teas when brewing. And, you can use a tetsubin with induction heat. Of course, you can use glass, but, watch out for the tea gestapo! :lol:
This presumably does not include Malaysia which is right on your doorstep!

Everywhere I went - almost exclusively - it was Glass Kettles in use in the Tea Shops - eschewing thermometers the use of 'Shrimp Eyes' 'Fish Eyes' 'Dragon Eyes' to determine when the water was hot enough for the tea in question was made easier by use of a glass kettle. Some of the fancier / speciality shops in Chinatown or upmarket shopping malls sold the Clay Kettles, but brewed tea for you to taste in a Glass Kettle AND smaller neighbourhood outlets only sold Glass Kettles.

Some of the shops keep their water supply in large urns to improve and then boil it in Glass kettles.

This badly taken photo of mine from Wisdom Arts in Kuala Lumpur Chinatown - shows both the water container and Glass kettle - used by a large group of tea drinking enthusiasts with over 30 years experience of drinking tea, regular visits to China, and collecting top quality tea.



Image

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by Tead Off » Apr 3rd, '09, 08:59

Herb_Master wrote:
Tead Off wrote:I think most tea drinkers would not use glass for a kettle. The idea of using the tetsubin is to change the structure of the water because of the iron content giving a better flavor to certain teas when brewing. And, you can use a tetsubin with induction heat. Of course, you can use glass, but, watch out for the tea gestapo! :lol:
This presumably does not include Malaysia which is right on your doorstep!

Everywhere I went - almost exclusively - it was Glass Kettles in use in the Tea Shops - eschewing thermometers the use of 'Shrimp Eyes' 'Fish Eyes' 'Dragon Eyes' to determine when the water was hot enough for the tea in question was made easier by use of a glass kettle. Some of the fancier / speciality shops in Chinatown or upmarket shopping malls sold the Clay Kettles, but brewed tea for you to taste in a Glass Kettle AND smaller neighbourhood outlets only sold Glass Kettles.

Some of the shops keep their water supply in large urns to improve and then boil it in Glass kettles.

This badly taken photo of mine from Wisdom Arts in Kuala Lumpur Chinatown - shows both the water container and Glass kettle - used by a large group of tea drinking enthusiasts with over 30 years experience of drinking tea, regular visits to China, and collecting top quality tea.



Image
Do you notice that red clay teapot on the table?!!

I'll be in KL next week and will check out what you say. In the 90's in Asia, I never saw a glass kettle being used anywhere. Maybe this gave me the assumption that glass was not preferred. Or, maybe, they were few and far between. I was also in Hong Kong recently and every tea shop I visited had a Kamjove, same here in Bangkok.

If you're not using pure clay for your pot it won't matter how the water is boiled, IMO. Glass does make a big difference in seeing those fish eyes. :wink:

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by teachaite » Apr 3rd, '09, 09:26

Wait so can you put a cast iron on the stove to boil water?

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by hop_goblin » Apr 3rd, '09, 12:02

wyardley wrote:
I think most tea drinkers would not use glass for a kettle.
I use a completely glass (non-induction) kettle, and I've used a glass kettle with a metal base (also non-induction) in the past. For me, the biggest drawback is the slow boil (which many people agree is not ideal for water, and of course it's also a little test of one's patience at times) -- about 15-20 minutes to bring 3/4 of the kettle to a boil after the hot plate is completely warmed up. I assume this is because all of the heat is coming from one part of the kettle, whereas a kettle that conducts / retains heat more would heat the water faster. I assume the induction one would be faster than these other kinds, but I don't know by how much.

Image

I can think of a number of people who know a lot more than I do about tea who use and / or recommend glass kettles. Best Tea House in HK (and Canada), Tea Gallery in NY, I believe Wisteria Teahouse in Taipei uses them, etc. etc.

I think most tea drinkers use stainless steel and / or plastic kettles, and in comparison to those, glass has some advantages. Glass kettles are also fairly practical (don't rust), fairly light and easy to handle, and make it easy to see exactly what the water is doing. An earthenware or iron kettle will probably retain heat longer than glass, which I would say is good in some situations, maybe not as good in others.

I think it's safe to say that a glass kettle is unlikely to improve the water, but on the other hand, it's also pretty safe to say it won't hurt it. And you can use things like bamboo charcoal, gypsum, maifan stones, broken up teapots, etc. if you want to try to improve the flavor of the water.

Image
Say Will, which set up do you prefer? The tea tray or the teaboat? Btw, both are very nice indeed!

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by wyardley » Apr 3rd, '09, 13:17

I think most shops that use glass pre-heat the water one way or another. It's maybe not the best solution, but necessary. If you'll notice, in that KL teashop picture, there's a metal electric kettle right behind the table.
hop_goblin wrote: Say Will, which set up do you prefer? The tea tray or the teaboat? Btw, both are very nice indeed!
That tray is actually Phyll's; none of mine are that nice. But these days I mostly don't use one except at work. Partially just to make myself think more and be less sloppy.

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