Choose your “rice bowl” carefully
At present, people generally take food quality and safety such as cleanliness, freshness, and the presence or absence of additives as the first consideration before eating, and the bowls that temporarily store food during meals are the indispensable dinnerware quality for our three meals a day. Safety is often overlooked. dinnerware and chopsticks on the market are made of ceramic, metal, wood, and bamboo, and the prices range from low to high. There are countless patterns and styles.
But choosing a set of safe and healthy bowls is not an easy task.
Generally speaking, ceramic dinnerware has various shapes, delicate and smooth shapes, bright colors and easy to clean. It is the first choice for most families to buy dinnerware. So how do we test the safety of ceramic dinnerware?
The quality of ceramic dinnerware can be identified by thermal shock resistance, microwave oven adaptability, water absorption, and heavy metal migration.
Thermal shock resistance is a characteristic index that indicates the ability of ceramic products to resist rapid changes in external temperature without cracks or damage.
The adaptability of microwave ovens is tested because daily ceramic products have a certain amount of water absorption. During the cleaning process after use, the product body will absorb some moisture. During the use of microwave ovens and ovens, the vaporization of moisture may cause cracking or damage to the product.
Very few products may be vaporized too fast, and the water vapor cannot escape through the unglazed part of the product, causing the product to burst in the microwave or oven.
Beware of excessive heavy metal dinnerware
And the biggest harm of inferior dinnerware is whether there are heavy metals in it, and whether the dissolution of these heavy metals exceeds the standard.
According to data, in the process of making daily-use ceramics, lead, cadmium, etc. are likely to be present in the glaze and decorative patterns on the surface of the ceramics. When they are used to hold acidic food, the dissolution of these heavy metals increases. Human blood, blood vessels, nerves, organs, immune system, etc. cause harm.
even lead to the occurrence of various diseases. In addition, the harmful substances in inferior ceramics, in addition to being easily dissolved in acidic food, will also be dissolved by heating. Therefore, inferior dinnerware is not recommended to be placed in the microwave oven.
When choosing ceramic dinnerware, try not to use glaze decoration, especially the inner wall of ceramic dinnerware should not be painted. This is because when the manufacturer fires ceramic dinnerware, in order to ensure the effective combination of the pigment and the porcelain body, some co-solvents will be added, and these co-solvents contain heavy metal elements such as lead and cadmium.
When these heavy metals come into contact with food, they can enter the body through food. The purchased ceramic dinnerware can be soaked in vinegar and 10 times of water for 2 to 3 hours and then boiled, which can precipitate toxic heavy metals and reduce the potential harm of ceramic dinnerware to the human body.
In view of the longer the ceramic dinnerware holds acidic food or liquid, the higher the temperature, the easier it is to dissolve heavy metal substances. It is not recommended to use ceramic dinnerware to store acidic food and liquids such as juice, wine, and coffee for a long time.
Choose a set of high-quality ceramic dinnerware
1. To touch. Touch the outer wall and inner wall of the dinnerware for a week. If the pattern on the surface is convex, it means that the glaze is applied. If the dinnerware feels rough, it means that the craftsmanship is immature, fragile and easy to bump.
2. Look at the texture. Rough-textured dinnerware, even if it does not contain heavy metals, still has cleaning problems, and is easily broken by hot and cold stimulation.
3. Upside down the dinnerware, you can see whether the mouth of the dinnerware is flat. It can also be stacked. If the dinnerware cannot be stacked together, it means the shape is irregular.
4. Listen to the sound. Tap the dinnerware lightly with chopsticks. If the sound is cloudy and not crisp, it means that the dinnerware is rough in texture and prone to cracks.
5. Look at the color. It is generally not recommended to buy dinnerware with strong colors, especially the inside of the dinnerware, the part that touches the food.
6. Choose regular products. Choose dinnerware produced by regular manufacturers and passed national security monitoring. Buy the dinnerware, it is best to soak in acetic acid before use.
In addition to ceramic dinnerware, let’s briefly introduce the dinnerware of other materials on the market:
Plastic dinnerware: “colored” looks good and unhealthy
Plastic products compete with glass products due to their advantages of being light and not brittle.
However, the surface of many plastic dinnerware has beautiful colorful patterns. If the content of lead, cadmium and other metal elements in the pattern exceeds the standard, it will cause harm to the human body. Generally, there is a protective film on the surface of plastic products. Once the film is scratched by a hard tool, harmful substances will be released. Therefore, consumers should try their best to choose plastic dinnerware that has no decorative patterns, is colorless and odorless, has a smooth surface and feels strong.
Glass dinnerware: “Crystal glass” has many hidden dangers
Glass dishes have the characteristics of high hardness, stable chemical properties, smooth surface, easy to clean, and environmental protection. Glass dinnerware is hygienic and free of toxic substances. But crystal glass dinnerware is a threatening source of lead pollution. Since the lead oxide content in crystal products is as high as 20% to 30%, using it to hold water will generally not cause lead poisoning. However, when using crystal glass containers to hold other beverages, especially wine, cola, honey, fruit juice and acidic foods, lead ions are also prone to form soluble lead salts that are ingested by the human body along with beverages or food.
Post time: Jun-16-2022