Bone china is a kind of ceramics. The raw materials of ceramics are lead-free, so the raw materials of bone china must be no problem. The key to bone china containing no lead depends on the glazing process. The glazing of bone china is divided into three types: over-glaze, mid-glaze, and under-glaze. Different production processes vary greatly. Generally, the glaze contains lead, and the bone china produced by the over-glaze color method, in which heavy metals such as lead and chromium will be deposited during the cooling process.

When using the on-glaze color method to glaze, the regular manufacturers will invest a lot of financial resources, improve the production process, and adopt a special lead discharge process to discharge heavy metals such as lead in the glaze as much as possible to ensure that the final lead content is not Exceeding the standard will not harm the body.

However, some small, unknown manufacturers will definitely not invest a lot of financial resources to improve the lead discharge process, so the bone china produced is all lead in excess, which is harmful to the body.

The lead content of bone china produced using underglaze and in-glaze colors is obviously lower, so now many large manufacturers have begun to use these two glazing methods. However, it is obvious that these two processes will increase production costs, so ordinary small manufacturers will not use this method.

In addition, lead-free glazes have also appeared, so that no matter what method is used, the glaze will not be produced.

In short, when buying bone china, one must look for big brands, large manufacturers, and regular manufacturers’ bone china products are guaranteed; second, pay attention to price issues, pay attention to bone china with too low prices, which may be produced by small manufacturers , It is very likely that the lead content will exceed the standard.