You can microwave plain paper plates, but you shouldn't use plastic-coated tableware. The plastic coating on some tableware can melt in the microwave, which could potentially release harmful chemicals into your food. While there are many types of paper plates that are safe to use in the microwave, it's always best to err on the side of caution and choose plates made specifically for microwaving. With a little bit of care, you can safely enjoy your food without worrying about potential health risks.