Is the ceramic bowl poisonous? Experts teach you to buy healthy ceramic bowls.

Usually, some beautiful-looking ceramic tableware may still have toxic substances on its surface due to improper processing. When choosing ceramic bowls, people may pay more attention to surface defects such as appearance, color, cracks and spots, and sometimes ignore the quality of ceramic bowls. However, ceramic bowls are containers for food after all, so if we buy substandard toxic bowls, it will directly endanger our health. Let's see how to buy Bian Xiao ceramic bowls!

1. Is the ceramic bowl poisonous?

In some ceramic tableware shops, some cheap ceramic tableware was found, and the factory name was not printed on the bottom. The name of the factory is not printed because the raw materials and manufacturing technology used are not very good, and there will be chemical residues. If it is tested by relevant departments, it is definitely unqualified, so the manufacturer simply does not print the name and brand.

With regard to the manufacturing technology of ceramic tableware, the commonly used ceramic tableware is made by firing clay and adding a layer of glaze water.

Before the glaze water is fired, it usually contains red lead, which is also commonly known as "arsenic". After proper firing, red lead will be transformed into harmless lead chemicals, so qualified ceramic tableware is harmless to human body. However, some unqualified ceramic tableware in the market is due to insufficient baking temperature or improper processing by workers, which leads to excessive lead dissolution of ceramic products. When eating in such a bowl, lead may be leached by organic acids in food.

Ceramic tableware for daily use is generally painted with color patterns. If inferior pigments or pigments with high lead and cadmium content are used in processing, the baking process is not good, which may easily lead to excessive lead and cadmium dissolution. Long-term use of this tableware will lead and cadmium into the body with food. Lead can exist in the blood for a long time, causing vascular smooth muscle spasm, ischemia of important organs such as liver, kidney and brain, cell damage, affecting the normal metabolism of nerve cells, and also having adverse effects on children's intellectual development. Kidney is the main target organ of cadmium injury. Accumulation in bones can lead to decreased immunity, joint deformation and pain, commonly known as "pain".

Experts suggest that you should go to large shopping malls and supermarkets with guaranteed channels to choose ceramic tableware. At the same time, when purchasing ceramic tableware, we should pay attention to whether the appearance is geometric, whether there are damage, spots, bubbles, smoothness and so on.

At the same time, you can tap a few times with your fingers, and the sound is crisp, indicating good quality; If the voice is dull or hoarse, it is inferior. Generally, thin-walled ceramic products should be taken care of in sunlight or light, transparent, light and even in thickness. However, the glazed painted pottery is not as bright as the glazed pottery, and it is not smooth to the touch, and the edge of the picture has a convex feeling, which is an unqualified product.

Second, what kind of ceramic tableware may cause lead and cadmium hazards?

What kind of ceramic tableware may cause lead and cadmium hazards? According to experts, the ceramic tableware circulating in the market at present can be divided into glazed, glazed, underglazed, glazed and some unglazed white porcelain. Because ceramic tableware is decorated in different ways, its impact on health may be different. Among them, the contents of lead and cadmium in glaze, underglaze, most underglaze and white porcelain are very low. However, if the amount of pigment with high lead and cadmium content is too large during processing or the temperature and ventilation conditions during baking are not enough, it is easy to cause the dissolution of lead and cadmium to exceed the standard. Another kind of bone ash porcelain is white, transparent and smooth, which is deeply loved by consumers. However, it is difficult to make this kind of porcelain, and most of them use high-temperature plain firing and low-temperature glaze firing techniques. Its glaze adopts low-temperature lead-containing glaze, and if the production process is not properly controlled, the possibility of lead dissolution exceeding the standard is also great.

In order to avoid the possible adverse effects of tableware on health, experts remind that people should try to choose products with less decorative patterns and bright colors on the inner wall of glazed and underglaze ceramic tableware; Never buy tableware with patterns that can be erased by hand; Products that are not at ease can be soaked in vinegar for several hours. If obvious color changes are found, they should be discarded.

When choosing children's tableware, you must choose some brands of products. Don't be greedy for cheap. At present, children's antibacterial tableware has been developed in China. Its bright colors are made of organic pigments and do not contain eight harmful heavy metals such as lead and chromium. The nano-silver material is added into it, which has the functions of automatic sterilization and antibacterial, and has a good effect on children's resistance to germs.

Third, how to choose ceramic bowls

Steps/methods

1, choose ceramic tableware instead of glazed decoration, especially the inner wall of ceramic tableware should not be painted. You can choose underglaze or underglaze decoration. For example, blue and white is a kind of ceramics that people like to decorate with underglaze colors.

2, buy back the ceramic tableware, first soaked in 4 vinegar water to boil, so as to remove most of the toxic substances, greatly reducing the potential harm of ceramic tableware to human body.

3. Don't use ceramic tableware to store acidic foods and drinks such as juice, wine and coffee for a long time. Because the longer the ceramic tableware holds acidic food or drink and the higher the temperature, the easier it is to dissolve lead, which is equivalent to aggravating the toxic and side effects of lead dissolution.

4, whether the shape is geometric, whether there is damage, spots, bubbles, smooth. Ceramic products with prickly, mottled and even cracked surfaces are easy to overflow lead in their glazes and are not suitable for tableware.

5. when choosing porcelain decorated with gold and silver, rub it with your hands, and it will be the top grade if it does not fade.

6, tap a few times, the sound is crisp and good quality, and the dull or hoarse voice is inferior.

7. Most porcelain glue contains high lead, so it is not suitable for tableware after porcelain repair.

8. The surface glaze of porcelain is fired at a temperature above 800 degrees. If it does not reach 800 degrees, low-temperature glaze is harmful to human body. It is best for porcelain to reach 1350 degrees.

9. When purchasing complete sets of ceramic products, we should look at whether the glaze color, picture, luster and style of each piece are consistent, symmetrical and harmonious.

10. Thin-walled ceramic products should have a sense of transparency, be thin and light, and be uniform in thickness when taken care of in sunlight or light.

Choosing a ceramic bowl requires skill. Some ceramic utensils are harmful to human health because they are decorated with glazed colors. Glaze contains some harmful metals such as lead, which will affect the functions of human hematopoietic, nerve, kidney, blood vessels and other organs. When the human body ingests a certain amount of lead, it will have symptoms such as vomiting, nausea and abdominal pain. So, once neglected, the daily necessities necessary for this meal will be like a trace of poison? Like medicine, it gradually affects health. Therefore, we must not be greedy and cheap, but go to the mall to buy ceramic bowls with quality assurance.

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