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Are old Pyrex dishes safe to use in the microwave?

April 26, 2017dishes MICROWAVE Pyrex safe

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Are old Pyrex dishes safe to use in the microwave?

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Here’s a quick test to determine if the dishes are microwave safe. Microwave the empty container for one minute. It is unsafe for the microwave if it is warm; it is ok for reheating if it is lukewarm; and it is ok for actual cooking if it is cool. Source: Angela Fraser, Ph.D., Assistant Professor, Food Safety Specialist, North Carolina Cooperative Extension Service, North Carolina State University.