these will not be present in the plates in the same way that they are in food. this means that the microwave will not heat properly and could be dangerous as well as quite possibly damaging your new dinner system. the best idea is to heat all of them in the oven, especially if you are actually using it to cook with. is it safe to put my prize plates in the dishwasher? this is certainly really the same answer seeing that that for the microwave. you need to look on the dining plates themselves for a showing which says 'dishwasher safe' or 'dishwasher-friendly'. if there is not any marking 