>>9947750It is safe to use porcelain plates and bowls in the microwave. The thing you will need to avoid is gold or silver coloured paint, because of the metal content present in such paints.
Pyrex is another microwave friendly material that is safe to use. La Opala crockery is made from Pyrex.
Glass too can be used.
This, however, is rapidly leaving the realm of shit you shoulda been taught in school, to shit you shoulda been taught by your parents, and/or your microwave's manual.
Nonetheless, every day, some idiot will attempt to boil eggs in a microwave. (Which, yes, is possible with some tricks, but I'm talking of those who don't use them.)