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Tea (rec.drink.tea) Discussion relating to tea, the world's second most consumed beverage (after water), made by infusing or boiling the leaves of the tea plant (C. sinensis or close relatives) in water. |
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Recently it was found that Hong Kong Consumer counsul that some Chinse Zisha
cracle-glazed teaware contacins dangerous amounts of lead. Beware. http://www.consumer.org.hk/website/w...ases/p242.html Sasha. |
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Those were glazed zisha cups.. I'd avoid glazed ware from China and India.
"Alex Chaihorsky" > wrote in message .. . > Recently it was found that Hong Kong Consumer counsul that some Chinse Zisha > cracle-glazed teaware contacins dangerous amounts of lead. > Beware. > > http://www.consumer.org.hk/website/w...ases/p242.html > > Sasha. > > > |
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Those were glazed zisha cups.. I'd avoid glazed ware from China and India.
"Alex Chaihorsky" > wrote in message .. . > Recently it was found that Hong Kong Consumer counsul that some Chinse Zisha > cracle-glazed teaware contacins dangerous amounts of lead. > Beware. > > http://www.consumer.org.hk/website/w...ases/p242.html > > Sasha. > > > |
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When did glazed zisha become en vogue. It's been a while but mine are
unglazed. Even my generic red terracotta pots are unglazed. If someone is selling me glazed zisha I'd suspect the origin. I know Chinese pottery paint has lead but that is normally glazed over making safe for use. You can have a glaze with Chinese paint on top and that is an absolute no-no for use only decorative. Jim "Falky foo" > wrote in message > ... > Those were glazed zisha cups.. I'd avoid glazed ware from China and India. > > "Alex Chaihorsky" > wrote in message > .. . > > Recently it was found that Hong Kong Consumer counsul that some Chinse > Zisha > > cracle-glazed teaware contacins dangerous amounts of lead. > > Beware. > > > > http://www.consumer.org.hk/website/w...ases/p242.html > > > > Sasha. |
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I don't really get the point of glazing zisha either. Maybe a glazed
outside but then you wouldn't be worried about the lead leaching into the tea would you? And since I like to see my tea against a white background when I'm drinking it, I don't buy zisha cups anyhow, just plain ceramic. "Space Cowboy" > wrote in message om... > When did glazed zisha become en vogue. It's been a while but mine are > unglazed. Even my generic red terracotta pots are unglazed. If > someone is selling me glazed zisha I'd suspect the origin. I know > Chinese pottery paint has lead but that is normally glazed over making > safe for use. You can have a glaze with Chinese paint on top and that > is an absolute no-no for use only decorative. > > Jim > > "Falky foo" > wrote in message > ... > > Those were glazed zisha cups.. I'd avoid glazed ware from China and India. > > > > "Alex Chaihorsky" > wrote in message > > .. . > > > Recently it was found that Hong Kong Consumer counsul that some Chinse > > Zisha > > > cracle-glazed teaware contacins dangerous amounts of lead. > > > Beware. > > > > > > http://www.consumer.org.hk/website/w...ases/p242.html > > > > > > Sasha. |
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I don't really get the point of glazing zisha either. Maybe a glazed
outside but then you wouldn't be worried about the lead leaching into the tea would you? And since I like to see my tea against a white background when I'm drinking it, I don't buy zisha cups anyhow, just plain ceramic. "Space Cowboy" > wrote in message om... > When did glazed zisha become en vogue. It's been a while but mine are > unglazed. Even my generic red terracotta pots are unglazed. If > someone is selling me glazed zisha I'd suspect the origin. I know > Chinese pottery paint has lead but that is normally glazed over making > safe for use. You can have a glaze with Chinese paint on top and that > is an absolute no-no for use only decorative. > > Jim > > "Falky foo" > wrote in message > ... > > Those were glazed zisha cups.. I'd avoid glazed ware from China and India. > > > > "Alex Chaihorsky" > wrote in message > > .. . > > > Recently it was found that Hong Kong Consumer counsul that some Chinse > > Zisha > > > cracle-glazed teaware contacins dangerous amounts of lead. > > > Beware. > > > > > > http://www.consumer.org.hk/website/w...ases/p242.html > > > > > > Sasha. |
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You all assume that Zisha = teapot, which it is not. Zisha is "Yixing clay".
I put it in "" because it is actually not clay but a paste that is made from a clayish sandy rock that is found in Yixing, China.. And while there is no point of glazing teapots (chahu), there are zisha gaiwans, chabeis, wenxiangbeis, chahai and other "zisha teaware", besides teapots (chahu). Sasha. "Falky foo" > wrote in message . com... >I don't really get the point of glazing zisha either. Maybe a glazed > outside but then you wouldn't be worried about the lead leaching into the > tea would you? > > And since I like to see my tea against a white background when I'm > drinking > it, I don't buy zisha cups anyhow, just plain ceramic. > > > "Space Cowboy" > wrote in message > om... >> When did glazed zisha become en vogue. It's been a while but mine are >> unglazed. Even my generic red terracotta pots are unglazed. If >> someone is selling me glazed zisha I'd suspect the origin. I know >> Chinese pottery paint has lead but that is normally glazed over making >> safe for use. You can have a glaze with Chinese paint on top and that >> is an absolute no-no for use only decorative. >> >> Jim >> >> "Falky foo" > wrote in message > > ... >> > Those were glazed zisha cups.. I'd avoid glazed ware from China and > India. >> > >> > "Alex Chaihorsky" > wrote in message >> > .. . >> > > Recently it was found that Hong Kong Consumer counsul that some >> > > Chinse >> > Zisha >> > > cracle-glazed teaware contacins dangerous amounts of lead. >> > > Beware. >> > > >> > > http://www.consumer.org.hk/website/w...ases/p242.html >> > > >> > > Sasha. > > |
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You all assume that Zisha = teapot, which it is not. Zisha is "Yixing clay".
I put it in "" because it is actually not clay but a paste that is made from a clayish sandy rock that is found in Yixing, China.. And while there is no point of glazing teapots (chahu), there are zisha gaiwans, chabeis, wenxiangbeis, chahai and other "zisha teaware", besides teapots (chahu). Sasha. "Falky foo" > wrote in message . com... >I don't really get the point of glazing zisha either. Maybe a glazed > outside but then you wouldn't be worried about the lead leaching into the > tea would you? > > And since I like to see my tea against a white background when I'm > drinking > it, I don't buy zisha cups anyhow, just plain ceramic. > > > "Space Cowboy" > wrote in message > om... >> When did glazed zisha become en vogue. It's been a while but mine are >> unglazed. Even my generic red terracotta pots are unglazed. If >> someone is selling me glazed zisha I'd suspect the origin. I know >> Chinese pottery paint has lead but that is normally glazed over making >> safe for use. You can have a glaze with Chinese paint on top and that >> is an absolute no-no for use only decorative. >> >> Jim >> >> "Falky foo" > wrote in message > > ... >> > Those were glazed zisha cups.. I'd avoid glazed ware from China and > India. >> > >> > "Alex Chaihorsky" > wrote in message >> > .. . >> > > Recently it was found that Hong Kong Consumer counsul that some >> > > Chinse >> > Zisha >> > > cracle-glazed teaware contacins dangerous amounts of lead. >> > > Beware. >> > > >> > > http://www.consumer.org.hk/website/w...ases/p242.html >> > > >> > > Sasha. > > |
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I'm thinking of fired glazed "Yixing clay" which too me would be an
anomaly. There is no reason to glaze Yixing in any application. The only source of lead in pottery is Chinese paint. That's a known problem which needs glazing. In Chinatown I see Yixing sets of pot, cup, tray with no glazing. I think where there is glaze there is paint and a fake. Possibly in a commercial application such as a restaurant you might find glazed Yixing but I'd still think a fake. I could take any greenware, apply purple Chinese paint, fire and glaze for a 'glazed' Yixing look. The glaze is important not for health reason but to prevent scratching revealing nonYixing substrate. You can usually see signs of painting at bases of cups,pots,bowls,trays. Jim "Alex Chaihorsky" > wrote in message >... > You all assume that Zisha = teapot, which it is not. Zisha is "Yixing clay". > I put it in "" because it is actually not clay but a paste that is made from > a clayish sandy rock that is found in Yixing, China.. And while there is no > point of glazing teapots (chahu), there are zisha gaiwans, chabeis, > wenxiangbeis, chahai and other "zisha teaware", besides teapots (chahu). > > Sasha. > > "Falky foo" > wrote in message > . com... > >I don't really get the point of glazing zisha either. Maybe a glazed > > outside but then you wouldn't be worried about the lead leaching into the > > tea would you? > > > > And since I like to see my tea against a white background when I'm > > drinking > > it, I don't buy zisha cups anyhow, just plain ceramic. > > > > > > "Space Cowboy" > wrote in message > > om... > >> When did glazed zisha become en vogue. It's been a while but mine are > >> unglazed. Even my generic red terracotta pots are unglazed. If > >> someone is selling me glazed zisha I'd suspect the origin. I know > >> Chinese pottery paint has lead but that is normally glazed over making > >> safe for use. You can have a glaze with Chinese paint on top and that > >> is an absolute no-no for use only decorative. > >> > >> Jim > >> > >> "Falky foo" > wrote in message > > ... > >> > Those were glazed zisha cups.. I'd avoid glazed ware from China and > India. > >> > > >> > "Alex Chaihorsky" > wrote in message > >> > .. . > >> > > Recently it was found that Hong Kong Consumer counsul that some > >> > > Chinse > Zisha > >> > > cracle-glazed teaware contacins dangerous amounts of lead. > >> > > Beware. > >> > > > >> > > http://www.consumer.org.hk/website/w...ases/p242.html > >> > > > >> > > Sasha. |
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I'm thinking of fired glazed "Yixing clay" which too me would be an
anomaly. There is no reason to glaze Yixing in any application. The only source of lead in pottery is Chinese paint. That's a known problem which needs glazing. In Chinatown I see Yixing sets of pot, cup, tray with no glazing. I think where there is glaze there is paint and a fake. Possibly in a commercial application such as a restaurant you might find glazed Yixing but I'd still think a fake. I could take any greenware, apply purple Chinese paint, fire and glaze for a 'glazed' Yixing look. The glaze is important not for health reason but to prevent scratching revealing nonYixing substrate. You can usually see signs of painting at bases of cups,pots,bowls,trays. Jim "Alex Chaihorsky" > wrote in message >... > You all assume that Zisha = teapot, which it is not. Zisha is "Yixing clay". > I put it in "" because it is actually not clay but a paste that is made from > a clayish sandy rock that is found in Yixing, China.. And while there is no > point of glazing teapots (chahu), there are zisha gaiwans, chabeis, > wenxiangbeis, chahai and other "zisha teaware", besides teapots (chahu). > > Sasha. > > "Falky foo" > wrote in message > . com... > >I don't really get the point of glazing zisha either. Maybe a glazed > > outside but then you wouldn't be worried about the lead leaching into the > > tea would you? > > > > And since I like to see my tea against a white background when I'm > > drinking > > it, I don't buy zisha cups anyhow, just plain ceramic. > > > > > > "Space Cowboy" > wrote in message > > om... > >> When did glazed zisha become en vogue. It's been a while but mine are > >> unglazed. Even my generic red terracotta pots are unglazed. If > >> someone is selling me glazed zisha I'd suspect the origin. I know > >> Chinese pottery paint has lead but that is normally glazed over making > >> safe for use. You can have a glaze with Chinese paint on top and that > >> is an absolute no-no for use only decorative. > >> > >> Jim > >> > >> "Falky foo" > wrote in message > > ... > >> > Those were glazed zisha cups.. I'd avoid glazed ware from China and > India. > >> > > >> > "Alex Chaihorsky" > wrote in message > >> > .. . > >> > > Recently it was found that Hong Kong Consumer counsul that some > >> > > Chinse > Zisha > >> > > cracle-glazed teaware contacins dangerous amounts of lead. > >> > > Beware. > >> > > > >> > > http://www.consumer.org.hk/website/w...ases/p242.html > >> > > > >> > > Sasha. |
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In fact I always heard it was the glaze itself that has the lead in it.
"Michael Plant" > wrote in message ... > Space 9/23/04 > > > > I'm thinking of fired glazed "Yixing clay" which too me would be an > > anomaly. There is no reason to glaze Yixing in any application. The > > only source of lead in pottery is Chinese paint. That's a known > > problem which needs glazing. In Chinatown I see Yixing sets of pot, > > cup, tray with no glazing. I think where there is glaze there is > > paint and a fake. Possibly in a commercial application such as a > > restaurant you might find glazed Yixing but I'd still think a fake. I > > could take any greenware, apply purple Chinese paint, fire and glaze > > for a 'glazed' Yixing look. The glaze is important not for health > > reason but to prevent scratching revealing nonYixing substrate. You > > can usually see signs of painting at bases of cups,pots,bowls,trays. > > > Taking off from Jim's thoughts about lead, it is important to note: > > If a component of a pot, be it clay or glaze or oxides painted under or over > the glaze, contains lead which is not fritted (stablized) then the person > who drinks from or eats from that pot is in danger of exposure to the lead. > Glaze will not protect. There are reasons which are technical. Alaric will > explain if need be. > > Michael > |
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This problem is common for purchasing Chinese plates for use or
decoration. If paint is fired first then fired second with glaze then okay for use. If fired together then decorative. If fired painted and unglazed then decorative. If paint on glaze then decorative. Normally packaging will indicate decorative only. I came across a Chinese site for Yixing and the only English for one of the pots 'drink emergency required'. Yixing historically has been exported to other countries for Western market 'finishing'. So glaze and paint indicate a second stop. Jim Michael Plant > wrote in message >... > Space 9/23/04 > > > > I'm thinking of fired glazed "Yixing clay" which too me would be an > > anomaly. There is no reason to glaze Yixing in any application. The > > only source of lead in pottery is Chinese paint. That's a known > > problem which needs glazing. In Chinatown I see Yixing sets of pot, > > cup, tray with no glazing. I think where there is glaze there is > > paint and a fake. Possibly in a commercial application such as a > > restaurant you might find glazed Yixing but I'd still think a fake. I > > could take any greenware, apply purple Chinese paint, fire and glaze > > for a 'glazed' Yixing look. The glaze is important not for health > > reason but to prevent scratching revealing nonYixing substrate. You > > can usually see signs of painting at bases of cups,pots,bowls,trays. > > > Taking off from Jim's thoughts about lead, it is important to note: > > If a component of a pot, be it clay or glaze or oxides painted under or over > the glaze, contains lead which is not fritted (stablized) then the person > who drinks from or eats from that pot is in danger of exposure to the lead. > Glaze will not protect. There are reasons which are technical. Alaric will > explain if need be. > > Michael |
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This problem is common for purchasing Chinese plates for use or
decoration. If paint is fired first then fired second with glaze then okay for use. If fired together then decorative. If fired painted and unglazed then decorative. If paint on glaze then decorative. Normally packaging will indicate decorative only. I came across a Chinese site for Yixing and the only English for one of the pots 'drink emergency required'. Yixing historically has been exported to other countries for Western market 'finishing'. So glaze and paint indicate a second stop. Jim Michael Plant > wrote in message >... > Space 9/23/04 > > > > I'm thinking of fired glazed "Yixing clay" which too me would be an > > anomaly. There is no reason to glaze Yixing in any application. The > > only source of lead in pottery is Chinese paint. That's a known > > problem which needs glazing. In Chinatown I see Yixing sets of pot, > > cup, tray with no glazing. I think where there is glaze there is > > paint and a fake. Possibly in a commercial application such as a > > restaurant you might find glazed Yixing but I'd still think a fake. I > > could take any greenware, apply purple Chinese paint, fire and glaze > > for a 'glazed' Yixing look. The glaze is important not for health > > reason but to prevent scratching revealing nonYixing substrate. You > > can usually see signs of painting at bases of cups,pots,bowls,trays. > > > Taking off from Jim's thoughts about lead, it is important to note: > > If a component of a pot, be it clay or glaze or oxides painted under or over > the glaze, contains lead which is not fritted (stablized) then the person > who drinks from or eats from that pot is in danger of exposure to the lead. > Glaze will not protect. There are reasons which are technical. Alaric will > explain if need be. > > Michael |
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That's absolutely right. Many people coming to know tea think that all clay
teapots are made Zisha. It really isn't so. There are several types of Yixing clay, and Zisha is the most common and popular amongst them. When the popularity of the Yixing clay rose with the demand for its pots, quarries in the neighbouring regions are also mined for clay as close to soil structure as Yixing. To achieve the success in the final products, other minerals - iron is the common ingredient - is added to the clay to give it a richer colour and sturdier texture. The sandy rock is mined and broken into clumps, which is then mixed with water into a clay-like putty and then set to work. Sometimes to achieve the required 'feel' of the pot, the clay putty is set aside for up to several decades before it's taken out to work on. Samar. "Alex Chaihorsky" > wrote in message . .. > You all assume that Zisha = teapot, which it is not. Zisha is "Yixing clay". > I put it in "" because it is actually not clay but a paste that is made from > a clayish sandy rock that is found in Yixing, China.. And while there is no > point of glazing teapots (chahu), there are zisha gaiwans, chabeis, > wenxiangbeis, chahai and other "zisha teaware", besides teapots (chahu). > > Sasha. > > "Falky foo" > wrote in message > . com... > >I don't really get the point of glazing zisha either. Maybe a glazed > > outside but then you wouldn't be worried about the lead leaching into the > > tea would you? > > > > And since I like to see my tea against a white background when I'm > > drinking > > it, I don't buy zisha cups anyhow, just plain ceramic. > > > > > > "Space Cowboy" > wrote in message > > om... > >> When did glazed zisha become en vogue. It's been a while but mine are > >> unglazed. Even my generic red terracotta pots are unglazed. If > >> someone is selling me glazed zisha I'd suspect the origin. I know > >> Chinese pottery paint has lead but that is normally glazed over making > >> safe for use. You can have a glaze with Chinese paint on top and that > >> is an absolute no-no for use only decorative. > >> > >> Jim > >> > >> "Falky foo" > wrote in message > > > ... > >> > Those were glazed zisha cups.. I'd avoid glazed ware from China and > > India. > >> > > >> > "Alex Chaihorsky" > wrote in message > >> > .. . > >> > > Recently it was found that Hong Kong Consumer counsul that some > >> > > Chinse > >> > Zisha > >> > > cracle-glazed teaware contacins dangerous amounts of lead. > >> > > Beware. > >> > > > >> > > http://www.consumer.org.hk/website/w...ases/p242.html > >> > > > >> > > Sasha. > > > > > > |
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That's absolutely right. Many people coming to know tea think that all clay
teapots are made Zisha. It really isn't so. There are several types of Yixing clay, and Zisha is the most common and popular amongst them. When the popularity of the Yixing clay rose with the demand for its pots, quarries in the neighbouring regions are also mined for clay as close to soil structure as Yixing. To achieve the success in the final products, other minerals - iron is the common ingredient - is added to the clay to give it a richer colour and sturdier texture. The sandy rock is mined and broken into clumps, which is then mixed with water into a clay-like putty and then set to work. Sometimes to achieve the required 'feel' of the pot, the clay putty is set aside for up to several decades before it's taken out to work on. Samar. "Alex Chaihorsky" > wrote in message . .. > You all assume that Zisha = teapot, which it is not. Zisha is "Yixing clay". > I put it in "" because it is actually not clay but a paste that is made from > a clayish sandy rock that is found in Yixing, China.. And while there is no > point of glazing teapots (chahu), there are zisha gaiwans, chabeis, > wenxiangbeis, chahai and other "zisha teaware", besides teapots (chahu). > > Sasha. > > "Falky foo" > wrote in message > . com... > >I don't really get the point of glazing zisha either. Maybe a glazed > > outside but then you wouldn't be worried about the lead leaching into the > > tea would you? > > > > And since I like to see my tea against a white background when I'm > > drinking > > it, I don't buy zisha cups anyhow, just plain ceramic. > > > > > > "Space Cowboy" > wrote in message > > om... > >> When did glazed zisha become en vogue. It's been a while but mine are > >> unglazed. Even my generic red terracotta pots are unglazed. If > >> someone is selling me glazed zisha I'd suspect the origin. I know > >> Chinese pottery paint has lead but that is normally glazed over making > >> safe for use. You can have a glaze with Chinese paint on top and that > >> is an absolute no-no for use only decorative. > >> > >> Jim > >> > >> "Falky foo" > wrote in message > > > ... > >> > Those were glazed zisha cups.. I'd avoid glazed ware from China and > > India. > >> > > >> > "Alex Chaihorsky" > wrote in message > >> > .. . > >> > > Recently it was found that Hong Kong Consumer counsul that some > >> > > Chinse > >> > Zisha > >> > > cracle-glazed teaware contacins dangerous amounts of lead. > >> > > Beware. > >> > > > >> > > http://www.consumer.org.hk/website/w...ases/p242.html > >> > > > >> > > Sasha. > > > > > > |
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