What are the main aspects of whether ceramic tableware is poisonous?

What are the main aspects of whether ceramic tableware is poisonous? The toxicity and non-toxicity of ceramic tableware mainly depends on two aspects. One is the raw material of chinaware ceramic, and the other is firing. The raw materials of ceramics include the raw materials of the green body, namely the clay, the raw materials of the glaze, namely the glaze, and the decorative materials of the ceramics, namely the paint. Generally speaking, porcelain tableware clay is generally porcelain clay (kaolin) or pottery clay. These two items are basically safe because they are natural clay or minerals. Generally, there is no chemical additives, but the grade quality is poor. The main problem lies in the glaze, paint and firing. Whether the clay, glaze, and painting materials are safe depends on the firing temperature. High-temperature porcelain white porcelin dinnerware is better than medium-temperature and low-temperature porcelain. With paint materials, underglaze and midglaze are better than overglaze. Any cheap porcelain white porcelin dinnerware with hand-painted patterns bought in a certain treasure is better to be used as a decorative plate or fruit plate, and not suitable for food holding utensils. Therefore, the choice of ceramic white porcelin dinnerware can try to choose the relatively safe utensils of the above types. Of course, the type does not mean safety. For example, the overglaze ceramic tableware of British Ceremony is green and environmentally friendly. However, some overglaze colors exceed the standard due to the lack of ventilation during firing, which makes the amount of lead and cadmium leaching out of the standard or the safe ceramics above are not good The materials are also bad.

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