Do ceramic tableware all contain lead, but the content is different?

Do ceramic white porcelin dinnerware all contain lead, but the content is different? contain lead, which should mainly refer to pigments. Therefore, it is better to choose ceramic tableware whose inner liner is pure white. The following are some materials compiled by the editor of ceramic tableware manufacturers, I hope it will be helpful to you. 1. Most of the porcelain tableware contains lead to some extent, mainly because of the color. It seems that only blue and white porcelain does not contain lead because the pigment is pure plant. 2. Pottery is fired with clay, the firing temperature is lower; porcelain is fired with porcelain clay, the firing temperature is higher. The texture of pottery is coarse and opaque, so it is less used as tableware; while porcelain is dense and translucent, and it is mostly used as tableware. Pure porcelain is harmless to the human body. 3. But in fact, in order to make the porcelain impermeable and beautiful, people often glaze and color it, and paint it with colorful glaze, which causes the ceramic products to contain lead. The amount of lead dissolved in ceramic tableware mainly comes from the decorative materials on the ceramic glaze, such as ceramic pigments and ceramic decals. 4. The picture decoration of ceramics can be roughly divided into over-glaze, mid-glaze, under-glaze and white porcelain. On-glaze ceramics are made of decals made of lead-containing pigments pasted on the glaze and baked at a high temperature of 700℃-850℃. Experts point out that this lead compound can be dissolved by acid, and when food comes in contact with the screen, lead may be dissolved by organic acid in the food. In terms of production process, porcelain with in-glaze and under-glaze is relatively safe. Of course, if the design of the on-glaze color is reasonable and the barbecue technology is appropriate, it can prevent the lead content from exceeding the standard. We soak the bowls with colorful patterns in acid solution according to the national regulations, and the soluble lead is all lower than the national standard. 5. However, even if you use such a bowl to hold acidic foods, based on the average amount of lead dissolved out, drinking 100ml per day, its cannibalistic lead can reach 26ug (porcelain bowl) or 3.6ug (imitation porcelain plastic bowl), respectively It is equivalent to 74% and 10% of the daily lead intake of 2-year-old children. What’s more serious is that in order to reduce costs, some operators purchase cheap decorative materials with high lead and cadmium content and unstable performance; during the production process, excessive decoration area, insufficient baking temperature or improper processing will cause lead dissolution of ceramic products. The amount does not meet the standard. 6. At present, the domestic daily-use ceramic food and beverage utensils market is still dominated by low-grade products, especially some individual and private enterprises, who are rushing to work quickly, shortening the baking time or lowering the baking temperature at will, and even using the certificate. The old-fashioned baking furnace controlled by experience has severely restricted the improvement of the overall quality of the industry. 7. Experts' suggestions on how to choose ceramic tableware whose lead leaching amount does not exceed the standard: The underglaze, in-glaze and white porcelain currently on the market do not contain lead and are relatively safe. On-glaze chinaware ceramic are easier to identify by visual inspection and touch-be careful if the picture is not as bright as the glazed surface, the hand feel is not smooth or even the edges of the picture are raised. A more reliable method can require distributors or manufacturers to provide a quality inspection report for the product, which is much safer than visual observation. 8. Experts also reminded not to blindly believe that imported ceramics are lead-free. Not long ago, the Hong Kong Customs inspected 600 types of porcelain tableware from Japan, Italy, the United Kingdom, Portugal and other countries, including bowls, saucers, cups and spoons of different sizes, and found that 526 types did not meet international standards and released excessive amounts of heavy metals. For lead, the unqualified rate is as high as 87%. 9. Experts pointed out that this lead compound can be dissolved by acid. When food comes into contact with the screen, lead may be dissolved by organic acid in the food. To be on the safe side, people are advised to soak them in vinegar for two to three hours before eating them. 10. Finally, I generally advise you not to use too brightly colored porcelain for tableware, especially those with colors on the inside. If you can't recognize the glaze, just use the pure white inner surface.

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