At present, many tableware and cups in the domestic market contain excessive lead. Such utensils are harmful to the body. So, does the relatively high-grade bone china contain no lead?
Bone china is a kind of ceramics. The raw materials of ceramics are lead-free, so there is no problem with the raw materials of bone china. Bone china contains no lead and the key is to see the glazing process. The glazing of bone china is divided into three types: on-glaze, in-glaze and under-glaze. Different production processes vary greatly. The general glaze contains lead, and the bone china produced by on-glaze color method, in which heavy metals, such as lead, chromium, etc., will be deposited during the cooling process.
When regular manufacturers use on-glaze color to glaze, they will invest a lot of financial resources to improve the production process, and use a special lead-exhausting 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 and unknown manufacturers will definitely not invest a lot of financial resources to improve the lead removal process, so the bone china produced is all lead exceeding the standard, which is harmful to the body.
The lead content of bone china produced by underglaze color and underglaze color is obviously lower, so many large manufacturers have begun to use these two glazing methods. However, it is obvious that these two processes will increase the production cost, so the general small manufacturers will not use this method.
In addition, lead-free glazes have also appeared, so that no lead is generated no matter what method is used for glazing. In short, when buying bone china, firstly, you should look for big brands, big manufacturers, and the bone china products of regular manufacturers are guaranteed; the second is to pay attention to the price problem, and you should pay attention to the bone china whose price is too low, which may be produced by small manufacturers , it is likely that the lead content will exceed the standard. So when we buy bone china, we must go to large supermarkets or regular manufacturers to buy it.
