All dishes will get hot in the microwave eventually. There is some truth to the idea that if a dish gets hot in the microwave it is not really microwave safe, but there is a time limit. Ex: if it gets hot in 30 seconds at full power at 1000 watts. I believe this takes into consideration that the dish in question contains food to be heated. I don't know what the "formula" is to determine this, anyone... ??
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