Ceramics used to be recognized as non-toxic tableware, porcelain tableware used poisoning reports. Originally some porcelain tableware's beautiful coat (glaze) contains lead, if burning porcelain when the temperature is not enough or the glaze ingredients do not meet the standard, it may make tableware contains more lead. When food is in contact with cutlery, lead may spill over the surface of the glaze into the food. Therefore, those surface prickly, many spots, enamel is not uniform even cracked ceramic products, not to do tableware. The choice of porcelain tableware, to use the index finger on the porcelain lightly, such as can emit crisp out of the general sound, it shows that the porcelain embryo delicate, firing good, if the sound of the clap, it is porcelain damaged or porcelain embryo quality inferior.