Tips to detect poisoned cups and bowls

According to chemical experts, porcelain, the more beautiful glass glitter or decorated with colorful patterns, the higher the risk of toxins.

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The more patterns, the more toxic

Explaining this issue, Dr. Nguyen Duy Thinh, Institute of Biotechnology - Food Technology said that the experiments show that the more colorful the ceramics, the greater the lead content.

Because glass is burned over 1,000 degrees Celsius, there is no color. The beautiful cup cup is brilliant because the manufacturer adds lead to create color and reduce the firing temperature to save energy. Lead is also coated outside for light transmission properties to make beautiful glitter glass. The most dangerous is that products that have a print close to the edge of the cup are more likely to get into the body when people eat, drink, especially young children.

Illustration.

In addition, manual glazed ceramics, if baked at low temperatures, can lead to lead poisoning for users. The reason is that usually, pottery must be heated at a temperature of 1,200 - 1,500 degrees Celsius. But if adding lead only needs to burn at 800 - 1,100 degrees Celsius, it has been a batch of finished products, saving both energy and medium Beautiful patterned products.

Therefore, the cheaper the manual firing products, the less standard the process is, even to be cut down to save time and costs, the more toxic it is. These toxic products stop severely high lead if they contain hot, sour, fruit juice . because at high temperatures, acidic, alkaline salt will lead to quick release, disinfection of food and Toxic to the body.

Also according to Dr. Nguyen Duy Thinh, should be careful with the specially designed cups and cups as gifts which are popular with many people because the pattern is glued and fermented to be baked at low temperature to keep the color. Do not remove lead poison in porcelain.

Test toxicity with vinegar and water

Dr. Tran Hong Con, Department of Chemistry (Hanoi National University) said that the content of lead in large glassware, having favorable conditions can stop, penetrate and accumulate in the body, affecting the nervous system , blood, severe poisoning, even death. If exposed to acidic, alkaline, or high-temperature environments surface atoms tend to detach from mixing with food and water. The higher the heat, the more activated the lead is separated.

Lead content in cups, cups, dishes can penetrate into the body through the respiratory, digestive and transdermal areas when the person holding or holding the product.

In order to ensure safety, Dr. Nguyen Duy Thinh recommends buying high quality, white, low-quality, plain ceramic dishes that are not too glossy.

Limit the use of colored enamel dishes in the bowl.When you see a dish that is rough, peeling glaze, or a reef, you should buy a new bowl (because the lead glaze is quickly abraded, the market is quickly peeled, the color fades and the content of lead escapes much and is absorbed. into food, very dangerous for users).

Do not use ceramic dishes to cook food in the microwave because the temperature in the oven makes the poison in ceramics easier to dissolve. Do not leave pickles in ceramics, but should be in glass jars.

With glassware, avoid sparkling, eye-catching things. Glass products should only be used without a coating on the outside (because the coating may be contaminated with lead). Should use branded products, clear origin, specify the content of lead (if any) on the surface.

In addition, consumers can also check the heating and toxic heavy metal of ceramic dishes by: Soaking the bowl in the vinegar solution, if the bowl has white markings or discolored vinegar, it should not be used. Or pour some water into an unglazed place (probably a bowl), if the water is sucked quickly, the bowl of bones doesn't have enough heat. If the bowl does not suck water is good bowl.

With glassware, toxic lead-containing products often sound like echoes when struck. Pure glass goods with no cries.

Dr. Nguyen Cong Khan, Director of Food Safety Department (Ministry of Health) also recommends that glasses and glasses of unknown origin should not be used. Glass cup, plastic food packaging should choose white color for food.

- Soak the bowl in the vinegar solution, if the bowl has white markings or discolored vinegar, it should not be used.

Or pour some water into an unglazed place (probably a bowl), if the water is sucked quickly, the bowl of bones doesn't have enough heat. If the bowl does not suck water is good bowl.

- Hazardous lead-containing glass products when knocked on sound like a metal. Pure glass goods with no cries.

Dr. Nguyen Duy Thinh - Institute of Biotechnology - Food Technology