Because the ceramic dinnerware has a layer of color glaze on the surface, which can make the dinnerware beautiful, smooth and easy to clean. However, these colored glazes contain harmful elements such as lead and mercury. If the ceramic dinnerware is unqualified, these elements can easily enter the human body with the food, which will cause chronic poisoning for a long time. So, how to choose ceramic dinnerware?
1. When purchasing, choose regular merchants and markets. It is best not to buy at irregular places such as roadside and small vendors. Recognize the manufacturer of ceramic dinnerware, because the state has regulations, after ceramic dinnerware is immersed in 4% acetic acid solution before leaving the factory, the dissolution of lead in dinnerware should be less than 7 mg/L, and the dissolution of cadmium should be Less than 0.5 mg / liter, so it is suitable for use. Formal manufacturers generally meet this requirement, while informal manufacturers cannot guarantee to meet this standard.
2. Pay attention to the fineness of the ceramic dinnerware, the glaze is uniform, the appearance pattern is meticulous and not rough. It is best to touch the surface of the dinnerware with your hand to see if it is smooth, especially the inner wall. Good quality dinnerware has no uneven small particles.
3. Smell the ceramic dinnerware. If there is a peculiar smell, the dinnerware has a high content of harmful elements, so do not buy it.
4. Don’t buy ceramic dinnerware with bright colors and patterns because of the pursuit of beauty and novelty. In order to make this dinnerware look better, some heavy metal additives are usually added to the glaze color. Heavy metals are harmful to the human body. Therefore, the brighter the ceramic dinnerware, the more heavy metal content it is, and the easier it is to exceed the standard.
5. It is best to choose ceramic dinnerware with in-glaze color and under-glaze color technology. These two processes have stricter requirements in the manufacturing process, and the content of heavy metals in the pigment is less.
6. Before using the ceramic dinnerware, boil it in boiling water for about 5 minutes, or soak it in vinegar for 2-3 minutes, which can dissolve the toxic elements in the dinnerware.
Post time: Jun-20-2022