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Food is the most important thing for people, and they need to eat. It is inseparable from pots, pans, and various tableware. For young children, colorful children's tableware is often used. However, this kind of high-looking tableware is usually painted and then fired at high temperature. For the sake of food safety, this tableware cannot be chosen randomly. The following aspects should be paid attention to:
1. Heavy metal migration amount
During the manufacturing process of ceramic tableware, Heavy metals such as lead and cadmium may be present in glazes and decorative patterns. If it is used to hold food, especially acidic food, lead and cadmium will dissolve into the food and enter the human body.
In view of the harm caused by excessive heavy metals to the human body, my country's product standard GB 4806.4-2016 "National Food Safety Standard Ceramic Products" clearly stipulates the migration limits of lead and cadmium.
2. Thermal shock resistance
Thermal shock resistance indicates the ability of a ceramic sample to resist rapid changes in external temperature without cracks or damage. Characteristic indicators are also important performance indicators. Daily ceramic tableware is mostly exposed to heated food during use. Products with unqualified thermal shock resistance will cause the product to crack or break under the action of thermal shock, thereby causing harm to the human body.
my country's product standard GB/T 3532-2009 "Daily Porcelain" stipulates that ceramic tableware can be heat exchanged at 180℃ to 20℃ without cracking once; daily bone china tableware can be heat exchanged at 140℃ to 20℃ Not cracked once.
3. Microwave oven adaptability of ceramic tableware
Since daily ceramic products All have a certain degree of water absorption. The product body will absorb some water during cleaning. The vaporization of water during use of the microwave oven may cause the product to crack or break, thereby causing injury to the user.
If the product label indicates that ceramic tableware is suitable for microwave ovens, in accordance with the test methods specified in my country's product standard GB/T 3532-2009 "Daily Porcelain", if there is no cracking and no arc generation in one cycle, it means that Characteristic indicators of whether a product is suitable for use in a microwave oven.
Other notes:
1. Try to buy ceramic tableware in regular stores, and carefully check whether the tableware is damaged, bubbles, spots, etc.
2. Try to choose products with no color patterns on the inner and outer lips. Ceramic tableware with interior decorations has greater quality and safety risks.
3.Products that are not marked with microwave compatibility or ceramic tableware with gold rims should avoid heating in the microwave when using them.
4. Avoid long-term use of ceramic tableware decorated with floral paper to store acidic food and drinks. The longer the storage time and the higher the temperature of the food, the easier it is for heavy metals to dissolve. Excessive dissolution will cause toxic side effects and endanger children's health.
