Text | Qijiu's mother
has been in school for a few days, the babies have gradually adapted to the kindergarten life, and the mothers have also begun to have a regular schedule. Nini from the neighbor’s house played with her grandma in the community park after school, and Xiaozui Barabara kept talking. Grandma asked her what she ate at school at noon? Nini said that there are chicken drumsticks, fruits and the like. The most important thing is that he likes the tableware provided in the school. They come in all colors, but they look good. Grandma then asked: What kind of tableware is it? Grandma also went to buy a special meal for Xiao Nini. It is understandable that the old people hurt their children, but what materials are the colorful tableware made of, and do they contain harmful substances?
It is understood that there are many types of tableware on the market, including glass, ceramic, wood and even plastic. These tableware of different materials have their own advantages and disadvantages.
glass: generally contains less harmful substances in glass tableware, but when the baby cannot eat independently, it is very dangerous to use glass bowls. There are shortcomings such as heat conduction too fast, easy to burn, fragile, and too heavy.
Wood: 's current wooden bowls are mostly made of man-made wood. Anti-corrosion materials may be mixed during the bowl making process, and the bowl surface is rough and easy to scratch.
Ceramics: Maybe mothers think ceramics are the safest, but in fact, the colored glaze or colored ceramics on the ceramics may produce toxic substances in the production process, and it is fragile and unsafe.
Plastic: Since other materials are rough and fragile, choose plastic products. Plastic bowls are also made of safe (PE\PES) qualified materials on the market, but plasticizers and bisphenol A still exist in the hearts of mothers. Analysis of
: glass is often fragile and the wood is too rough. In addition to ceramics, all mothers are willing to buy plastic tableware. How to choose these two kinds of tableware?
A Plastic: A common porcelain tableware on the market is actually a kind of plastic, also known as melamine resin. The melamine mentioned here is not life-threatening, and it is also non-toxic when made into tableware. But the most likely problem with this product is that the formaldehyde exceeds the standard. Because the reasonable temperature of melamine tableware is between -30℃-120℃. But when the oil temperature exceeds 230 ℃ during cooking, the formaldehyde completely exceeds the standard.
means that when using tableware made of this material, the temperature is controlled within the acceptable range of the material and there will be no formaldehyde release under normal circumstances.
B. Ceramics: ceramics have a long history, thinking: there is always nothing wrong with what the ancestors left. Yes, there is no problem with many ceramics, but with the development of the times and industrial progress, many ceramics have added something called flux in the production process. Among them, there is a glaze that uses lead as a flux, which contains about 20%. Lead oxide, this glaze is soft and unstable. If it is used to hold food, it will easily cause lead pollution.
lead glaze: The main component of glaze is silicon dioxide, which is thinly covered on the ceramic surface, which is equivalent to a layer of glass. The main function of the glaze is to look good and easy to clean. Lead glaze has a relatively low melting point and is used on low-temperature pottery. For example, the famous Tang Sancai and the colored glaze on the roof of the Forbidden City are all lead glaze.
Currently, the state has banned the use of lead glaze on tableware, but some small workshops still produce lead glaze utensils. Some people on the street are pushing tricycles to buy some bright ceramic products. They look brightly colored and opaque, and the sound is very low when tapped. It is best not to use them for tableware. How does
choose a suitable tableware?
1. The surface of the ceramic tableware is smooth and tidy, without protrusions, pits, bubbles, and stains. The shape should also be regular, free from defects, and stable.
2. Whether there is a production license for the company's products, that is, the QS mark.
3. The color should not be too gorgeous. The color of the imitation porcelain bowls sold on the market is the brightest, or the most attractive, and it is often possible to use urea-formaldehyde resin.
4. The reference price of imitation ceramic tableware, the material of which is urea-formaldehyde resin, is generally 5,000 yuan a ton, while melamine resin is about 14,000 yuan. Therefore, the regular imitation porcelain bowl is generally around 10 yuan, and the ones below 10 yuan are likely to be fakes.
