What is glaze? Is it poisonous?

Glaze is a substance coated on the ceramic surface, which can make the ceramic surface smooth and shiny and increase the aesthetic feeling. The main raw materials of glaze include pure raw materials such as feldspar, quartz, silicon and clay, and elements such as lead, chromium, copper and manganese may also be added.

In the process of making ceramics, in order to color the ceramics, some heavy metal elements such as lead are usually added to the glaze. Lead is harmful to human body in a certain content, and long-term use of lead-containing glaze may lead to lead poisoning. Symptoms such as muscle weakness, listlessness, headache, convulsion, nausea, vomiting, tightness in the upper abdomen and pain appear after poisoning. It may even damage the digestive system and nervous system.

But if the glaze is processed qualified and used properly, it will not cause direct harm to human body. Therefore, when choosing ceramic glaze products, we should try to choose products that meet the national safety standards and minimize direct contact with ceramic glaze.

The above information is for reference only, and whether it contains toxic substances needs to be judged according to the specific product type and manufacturing process. If necessary, it is recommended to consult professional and technical personnel.