As someone who works in a restaurant I feel the need to plate everything on a hot plate. At home, where I have no plate heater, I have always preheated my plates in the microwave. I was cooking at my friend's house and I put a stack of plates in the microwave to heat them up, and he expressed a lot of concern. I haven't had any problems before, but I have only tried with the plates in my house, which are mostly from Ikea. Is this a bad idea? Could this damage good china or porcelain?