The glass material itself comes from natural sources. After high temperature during the production process, harmful substances have been volatilized. The safety is high. Moreover, the glass is resistant to high temperature and has good thermal conductivity, so it is suitable for microwave cooking.
Ceramic containers have a wide range of applications, such as acid resistance, alkali resistance, oil resistance, high temperature resistance, low temperature resistance, high safety, and can be used for microwave cooking. However, it should be noted that the paint on colored ceramic containers may contain harmful substances such as lead and cadmium. According to different decoration methods, ceramic products can be divided into three types: over-glaze, under-glaze, and in-glaze. The underglaze and in-glaze colors are colored under the enamel, and the painted colors are not in direct contact with food, so they are relatively safe. On the other hand, on-glaze ceramics are painted on the surface of the ceramics and are in direct contact with food. The harmful substances lead and cadmium will enter the food and enter the human body with the food. If consumers cannot make a clear judgment on the type of glaze of ceramic tableware, for safety reasons, it is best to choose a ceramic container with a white achromatic pattern on the inside of the container.