Porcelain usually isn’t glazed and is made from a finer particulate clay allowing it to be smooth and non porous on its own. It’s the cheaper ceramics that rely on the glaze to be water proof that are prone to this problem.
If your dishes aren’t getting unusually hot in the microwave then they’re fine.
Sure, I’ll throw away all my porcelain dishes
Porcelain usually isn’t glazed and is made from a finer particulate clay allowing it to be smooth and non porous on its own. It’s the cheaper ceramics that rely on the glaze to be water proof that are prone to this problem.
If your dishes aren’t getting unusually hot in the microwave then they’re fine.
No, porcelain is usually glazed, just often with clear glaze, since it is already white to begin with. If the porcelain is shiny, then it is glazed.