When people increasingly turn their gaze to food safety, have they ever thought that unsafe hidden dangers may be looming in the increasingly colorful tableware of foods. Experts remind consumers - ceramic dishes carefully lead poisoning Chinese porcelain is world-famous. Ceramic tableware does not rust, does not decay, does not absorb water, the surface is hard and smooth, easy to wash, with other tableware is incomparable advantages, but the lead in ceramics is thousands of years of production process can not avoid the problem. Over the years, the relevant spot checks conducted by the national quality supervision department have also shown that the excessive amount of lead dissolved has become a common problem for ceramic tableware. When people use this cutlery to hold fruits, vegetables, milk, and other foods containing organic acids, the lead and other heavy metals in the dishes will dissolve and enter the human's stomach, liver, kidneys and other important organs and tissues along with the food. When the accumulation reaches a certain level, it will lead to lead poisoning.
It is understood that there are no potential safety hazards due to the fact that over 1300 degrees Celsius high temperature firing is required during the production process. The dissolution of lead in the ceramic tableware mainly originates from the decals of tableware. Due to the high refractive index of lead, the lead in appliqués can make ceramic dishes more colorful. However, in order to reduce costs, some small businesses use low-cost decorative materials with high lead and cadmium content, unstable performance, or fast workmanship. They may arbitrarily shorten the baking time or lower the baking temperature, leading to excessive lead dissolution; some companies To increase the output and install the kiln too dense, lead lead is not easily volatile; in addition, the decorative area is too large, baking temperature is not enough, or the process is not handled properly, will also lead to excessive lead in ceramic products.
As the dissolution of ceramic tableware comes mainly from decorative materials, Chen Qingchang reminded consumers to choose ceramic tableware, choose a decorative area is small or safe underglaze or glaze in the tableware, do not choose very colorful The inner wall is decorated with colored dishes. Underglaze flower surface decoration under the glaze, which is covered with a layer of "security film"; glaze medium color ceramic glaze flower paper in the high temperature of about 1250 °C rapid firing, do not need to use lead, cadmium Such as strong cooling flux raw materials, but also in the firing process, due to their own weight of color material will penetrate into the glaze a certain depth. For glaze on porcelain, it is easy to use visual and hand touch to identify, where the picture is less glazed light, feel smooth and even the edge of the screen with a raised sense should be carefully purchased.
Plastic tableware is a good smooth and smooth plastic microwave tableware, beautiful high-temperature resistant melamine tableware has become a household tableware, plastic is everywhere in people's lives, but when people use these plastic tableware, the heart will always To ask, are these plastic cutlery really safe?
Mr. Wan Qing, a senior engineer of the Institute of Light Industry Plastics Processing and Applications, believes that as long as plastic utensils are produced according to national standards, they are non-toxic. However, when people choose to buy plastic utensils, it is better to use a simple pattern and the color is fine. it is good. Wan Qing explained that the safety of microwave cutlery can be confirmed by the results of the measurement of polypropylene materials, consumption of potassium permanganate, evaporation residues, and decolorization tests; melamine plastic is a thermosetting plastic that Amine (melamine) formaldehyde resin as the main raw material, by adding an appropriate amount of pulp and cellulose fillers and auxiliary materials such as colorants, non-toxic, tasteless, acid and alkali-resistant; baby's milk bottles are polymer fibers. In general, all kinds of plastic tableware sold in regular shopping malls generally meet the national standards for quality inspection. They also perform well in high and low temperature tests. However, some tableware are decorated with some colorful plastics. Tableware is a security risk.
The tests conducted by the China Consumers Association on plastic bottles showed that the plastic impurities test of all tested samples met the requirements of the national standard. Zhu Yan, who is in charge of the test at the Renmin University of China's commodity inspection center, believes that organic colorants are best used for table-top colorants. However, organic coatings have high costs and the coloring power is not as good as that of inorganic coatings. Therefore, some companies will choose inorganic coatings with certain toxicity. Eventually caused excessive release of heavy metals. Therefore, when choosing plastic tableware, consumers should try to choose products that do not have decorative patterns or patterns that are not on the inner wall of the dishes.
In addition, Wan Qing introduced that because of the high price of cyano-ammonium chloride, some unscrupulous companies seek profit by replacing urea-formaldehyde molding powder in the production of melamine tableware. Cyanuric chloride powder, but tableware made of urea formaldehyde is harmful to the human body; there are also some companies that, in order to reduce costs, use waste plastics imported from abroad for smuggling or old plastics recycled in the country to make plastic tableware, These products are undoubtedly harmful to the human body. Because these products cannot have the pure color of a qualified product, they are often processed into some bright colors. At the same time, the resin has been stipulated at the factory and should be odorless and tasteless. If the meal has an odor, it indicates that the contaminant is contaminated or the source is unclear. It is better not to buy and use it.
Stainless steel cutlery is used properly. Stainless steel is made of iron-chromium alloy and then infiltrated with some trace elements. Due to its good metal properties and corrosion resistance compared to other metals, the utensils made are beautiful and durable, and are therefore increasingly used. To make tableware. Mr. Song Qinhai, engineer of the National Daily Hardware Quality Supervision and Inspection Center, said that on the cutlery, there are three types of plates with “13-0â€, “18-0†and “18-8â€. The chromium content indicates that the chromium in the material makes the product “stainlessâ€; the following figures represent the nickel content. From the performance point of view, the higher the nickel content of the product, the better the corrosion resistance. However, due to the harmful effects of heavy metals such as nickel and chromium on the human body, the country has relevant sanitary standards for its dissolution. In general, regular malls sell brand-name products, both in terms of quality and performance, or in terms of health indicators. No problem. However, if stainless steel cutlery is used improperly, the harmful metal elements in the product will also slowly accumulate in the human body, and when it reaches a certain limit, it will endanger human health. Therefore, when using stainless steel cutlery, especially when cooking and holding children's food, people should pay attention to the following points: Do not salt, soy sauce, vegetable soup, etc. for a long time, because these foods contain many electrolytes, if long time In full bloom, stainless steel will also react with these electrolytes like other metals, causing toxic metal elements to dissolve out. Stainless steel utensils cannot be used to decoct Chinese herbs, because Chinese herbs contain many alkaloids, organic acids and other ingredients, especially under heating conditions, it is difficult to avoid chemical reactions with them, so that the drug fails, and even generate some of the more toxic Compound. Do not wash with strong alkaline or strong oxidizing chemicals such as soda, bleach, sodium hypochlorite, etc. Because this will react chemically with stainless steel.
It is understood that there are no potential safety hazards due to the fact that over 1300 degrees Celsius high temperature firing is required during the production process. The dissolution of lead in the ceramic tableware mainly originates from the decals of tableware. Due to the high refractive index of lead, the lead in appliqués can make ceramic dishes more colorful. However, in order to reduce costs, some small businesses use low-cost decorative materials with high lead and cadmium content, unstable performance, or fast workmanship. They may arbitrarily shorten the baking time or lower the baking temperature, leading to excessive lead dissolution; some companies To increase the output and install the kiln too dense, lead lead is not easily volatile; in addition, the decorative area is too large, baking temperature is not enough, or the process is not handled properly, will also lead to excessive lead in ceramic products.
As the dissolution of ceramic tableware comes mainly from decorative materials, Chen Qingchang reminded consumers to choose ceramic tableware, choose a decorative area is small or safe underglaze or glaze in the tableware, do not choose very colorful The inner wall is decorated with colored dishes. Underglaze flower surface decoration under the glaze, which is covered with a layer of "security film"; glaze medium color ceramic glaze flower paper in the high temperature of about 1250 °C rapid firing, do not need to use lead, cadmium Such as strong cooling flux raw materials, but also in the firing process, due to their own weight of color material will penetrate into the glaze a certain depth. For glaze on porcelain, it is easy to use visual and hand touch to identify, where the picture is less glazed light, feel smooth and even the edge of the screen with a raised sense should be carefully purchased.
Plastic tableware is a good smooth and smooth plastic microwave tableware, beautiful high-temperature resistant melamine tableware has become a household tableware, plastic is everywhere in people's lives, but when people use these plastic tableware, the heart will always To ask, are these plastic cutlery really safe?
Mr. Wan Qing, a senior engineer of the Institute of Light Industry Plastics Processing and Applications, believes that as long as plastic utensils are produced according to national standards, they are non-toxic. However, when people choose to buy plastic utensils, it is better to use a simple pattern and the color is fine. it is good. Wan Qing explained that the safety of microwave cutlery can be confirmed by the results of the measurement of polypropylene materials, consumption of potassium permanganate, evaporation residues, and decolorization tests; melamine plastic is a thermosetting plastic that Amine (melamine) formaldehyde resin as the main raw material, by adding an appropriate amount of pulp and cellulose fillers and auxiliary materials such as colorants, non-toxic, tasteless, acid and alkali-resistant; baby's milk bottles are polymer fibers. In general, all kinds of plastic tableware sold in regular shopping malls generally meet the national standards for quality inspection. They also perform well in high and low temperature tests. However, some tableware are decorated with some colorful plastics. Tableware is a security risk.
The tests conducted by the China Consumers Association on plastic bottles showed that the plastic impurities test of all tested samples met the requirements of the national standard. Zhu Yan, who is in charge of the test at the Renmin University of China's commodity inspection center, believes that organic colorants are best used for table-top colorants. However, organic coatings have high costs and the coloring power is not as good as that of inorganic coatings. Therefore, some companies will choose inorganic coatings with certain toxicity. Eventually caused excessive release of heavy metals. Therefore, when choosing plastic tableware, consumers should try to choose products that do not have decorative patterns or patterns that are not on the inner wall of the dishes.
In addition, Wan Qing introduced that because of the high price of cyano-ammonium chloride, some unscrupulous companies seek profit by replacing urea-formaldehyde molding powder in the production of melamine tableware. Cyanuric chloride powder, but tableware made of urea formaldehyde is harmful to the human body; there are also some companies that, in order to reduce costs, use waste plastics imported from abroad for smuggling or old plastics recycled in the country to make plastic tableware, These products are undoubtedly harmful to the human body. Because these products cannot have the pure color of a qualified product, they are often processed into some bright colors. At the same time, the resin has been stipulated at the factory and should be odorless and tasteless. If the meal has an odor, it indicates that the contaminant is contaminated or the source is unclear. It is better not to buy and use it.
Stainless steel cutlery is used properly. Stainless steel is made of iron-chromium alloy and then infiltrated with some trace elements. Due to its good metal properties and corrosion resistance compared to other metals, the utensils made are beautiful and durable, and are therefore increasingly used. To make tableware. Mr. Song Qinhai, engineer of the National Daily Hardware Quality Supervision and Inspection Center, said that on the cutlery, there are three types of plates with “13-0â€, “18-0†and “18-8â€. The chromium content indicates that the chromium in the material makes the product “stainlessâ€; the following figures represent the nickel content. From the performance point of view, the higher the nickel content of the product, the better the corrosion resistance. However, due to the harmful effects of heavy metals such as nickel and chromium on the human body, the country has relevant sanitary standards for its dissolution. In general, regular malls sell brand-name products, both in terms of quality and performance, or in terms of health indicators. No problem. However, if stainless steel cutlery is used improperly, the harmful metal elements in the product will also slowly accumulate in the human body, and when it reaches a certain limit, it will endanger human health. Therefore, when using stainless steel cutlery, especially when cooking and holding children's food, people should pay attention to the following points: Do not salt, soy sauce, vegetable soup, etc. for a long time, because these foods contain many electrolytes, if long time In full bloom, stainless steel will also react with these electrolytes like other metals, causing toxic metal elements to dissolve out. Stainless steel utensils cannot be used to decoct Chinese herbs, because Chinese herbs contain many alkaloids, organic acids and other ingredients, especially under heating conditions, it is difficult to avoid chemical reactions with them, so that the drug fails, and even generate some of the more toxic Compound. Do not wash with strong alkaline or strong oxidizing chemicals such as soda, bleach, sodium hypochlorite, etc. Because this will react chemically with stainless steel.
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