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原帖由 河水洋洋 于 2012-6-17 14:56 发表 
这种玻璃只是热障冷缩系数比较小而已，并不一定是钢化玻璃。
也许是因为制造过程中玻璃锅盖本身的应力就很大，盖上锅盖关上火之后内部气压下降，外部气压楞是吧锅盖压碎了？
不知道，感觉和我平时用没什么不同。网上说，好像pyrex原来是个纯美国公司用的材料很好，后来卖给了一家中国的公司，用了一种别的材料以后质量就不稳定了。
I Googled exploding Pyrex dishes and got ten million hits.
Exploding Pyrex is very common.
Here is the story.
A long, long time ago in a country we all know and love was a company named Corning. They made Pryex dishes. The material they used is called borosilicate glass. This stuff is indestructible. But like everything else, the Bottom Liners had a great idea: sell the technology to another company. The Chinese discovered that using soda lime glass was almost as good as borosilicate glass and a lot cheaper. Today, Wal-Mart is the largest distributor of Pryex products. Corning not only sold the technology to a company called World Kitchen, they also sold the rights to the original Pyrex logo. Seamless. The consumer will never know.
Now it seems people are getting hurt using soda lime Pyrex. We were lucky because the dish broke while the oven was closed and the damage was limited to the oven cavity. Others have been less fortunate. Some dishes explode when they are lifted from the heating rack in the oven with devastating results. Some people are heavily scarred. World Kitchen is in denial. They say that the dishes are another brand, not theirs. Contrary to their denials the victims usually have more than one of these dishes and the Pryex logo is clearly visible.
If you buy a Pryex dish beware. The label on the front says oven safe, freezer safe, microwave safe. The instructions on the back tell another story. You cannot move a soda lime Pyrex dish from the freezer to the oven and expect it to survive. The fine print goes on and on about what you are not allowed to do with the Pyrex dish. The fine print has prevented World Kitchen from being sued becaus e they have warned the consumer that their Pyrex dishes are junk from the get go. And they are the same price as the original Corning dishes. What a bunch of losers we all are for buying this crap.
What to do?
If you own borosilicate Pryex dishe s no fear. They have to be more than 25 years old to be sure they are indeed Corning dishes. I am not sure if the old Pryex dishes have anything stamped in them that indicates they are made by Corning. You may continue to use the soda lime dishes for holding stuff. Just do not attempt to roast or microwave with them as the hazard is very clear.
The reason the soda lime dishes let go is that over time they develop micro-cracks. Once a few micro-cracks are present and once some liquid finds its way into the cracks you have the bomb situation. The liquid is like shoving a crowbar in the dish and pulling it apart. Super heated liquids expand rapidly and it is the super heated liquids that force the soda lime glass to shatter into tens of thousands of shards.
Since Corning no longer makes Pyrex and Sylvia proudly holds a large collection of the soda lime Pyrex, we decided that one bomb in the kitchen is enough. The Pyrex dishes will go bye-bye in this week’s trash. I do not know what we will use for cake and pie dishes going forward . If you have some suggestions we are listening.
strongly urge you not to use the soda lime Pyrex for the oven, stovetop or microwave. The slightest invisible crack is all it takes to have a mess and a possible injury.
As to World Kitchen: them and their cheap dishes. In case you are wondering: World Kitchen is not a USA company.
不知道上面的真假，就是google而来。 |
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我勤劳节约的外公外婆 (2010-2-18) 公主 
关于吃在Cairns & Port Douglas -摘自老朱的游记 (2008-1-16) patrickzhu 
发表于 2012-6-17 15:37
