Glasses heat resistant - all facts

Again and again glass bowls or drinking glasses break because they are heated too much. Actually, the temperature itself is not necessarily the problem. The glass usually shatters because it can not stand the temperature fluctuation. Which glasses but the temperatures endure better and what you recognize them, is here.

Melting point of glass

Glass melts in principle only at 600 degrees. Nevertheless, normal drinking glasses shatter when you pour boiling water. Unfortunately, glass is a poor conductor of heat and therefore does not tolerate sudden changes in temperature.

glass thickness

The glass thickness is not always an indication of the heat resistance of the glass. A normal bowl or a simple drinking glass can handle temperatures up to about 50 degrees very well. For crystal or lead crystal glasses other temperatures apply again. They become matt and milky inside at high temperatures. These glasses should not heat you permanently over 30 degrees - even when washing not.

Check mark - buy heat resistant glass

For both hot drinks and the casserole that you want to heat in the oven or in the microwave, you should buy special heat-resistant glass. The so-called Jenaer glass bowls, for example, have on the bottom of a mark indicating whether this bowl can only be used in the microwave, or in the oven. Another mark says that the bowl may even be used on the stove top. Not with any heat-resistant bowl is this the case.

Warm and freeze

Everyone knows that we need to cool a bowl before it can be frozen. But even when thawing, it is important to slowly adjust the glass and food to the changed temperature. It is ideal if you let the food thaw overnight in the fridge slowly.

Thaw frozen food in glass bowls and warm

  • no hot water over frozen glass bowls
  • do not put on the hot stove
  • Do not put in the oven or the microwave
  • turn on at least the lowest level in the microwave
  • Thaw if possible in the refrigerator

Tips & Tricks

You should also not put heat-resistant glasses in the preheated oven. You should also heat the stove slowly until the glass container is already on it.

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