Thick glass will sometimes crack when it is heated on one side. Glass does not conduct heat very quickly, so one side will expand while the other side will not. The uneven cooling process can lead to cracks in your dining table. To avoid cracks from uneven cooling, put a trivet under hot pots, pans and serving dishes when setting them on the table. This will protect your glass tabletop or table cover from heat-inducing cracks.
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