We all know that, if we accidentally put a plate with gold rim or a half-empty cup with a long spoon in the microwave, there is a small spark. But not every kind of metal has the same effect in the microwave. Here we show you if and how you can heat meals in aluminum in the microwave.
Not only aluminum is difficult in the microwave, ceramic can also cause problems. Older ceramics or stoneware dishes absorb some water when washed through the fine cracks in the glaze. As a result, this material absorbs the rays that are supposed to heat the food. So it happens that such shells are always extremely hot, but the food is not really warm.