The paintings on the inner wall of ceramic tableware are bright in color, but the glaze contains heavy metal elements such as lead, mercury, and cadmium. Among them, cadmium and lead can easily cause liver or other visceral poisoning, while mercury can cause liver and kidney sclerosis. The more glaze colors there are in ceramics, the brighter the colors, and the more compounds such as lead and cadmium there are.
Health advice: When choosing ceramic tableware, do not place too much emphasis on patterns and designs, especially do not use bowls or plates with painted inner walls. Newly purchased tableware can be soaked in vinegar for 2-3 hours to dissolve harmful substances in the glaze. Also, do not heat colored porcelain in the microwave.
Underglaze colored porcelain is the safest, with patterns in shades of blue-green and less reddish yellow
Underglaze color is achieved by first applying pigments, then glazing, and directly firing at high temperatures. As it does not require low melting point substances, lead does not need to be added to the pigments, and the pigments are not easily precipitated, making it the safest option; In glaze color is first glazed, then painted, and then fired at high temperature. It does not contain lead and the pigment is difficult to precipitate, making it relatively safe.
The areas with patterns on the underglaze color have a smooth texture and excellent glossiness like other areas, while the underglaze color falls somewhere in between. Although the glossiness is good, the texture is not smooth.
