We often come into contact with ceramic cups. Nowadays, most people do not need enamel cups, but there are also many uses for tableware such as enamel bowls and enamel pots. Ceramic cups and enamel cups both have porcelain, so what is the relationship between them?
Enamel cup is a type of utensil in which the metal is coated with one or more layers of enamel on both the inside and outside. The enamel on the outside of the enamel cup is composed of sodium silicate and metal salts. Generally, pure white enamel products do not contain lead, but contain heavy metals such as aluminum, while other colors require the addition of some metal salts. Therefore, enamel products not only contain heavy metals, but also lead, cadmium, tin, etc. However, because enamel has such a layer that does not precipitate, as long as these harmful elements do not pose a threat to human health. The firing temperature of enamel products after porcelain plating is about 700 ℃, so their chemical properties are unstable. If a good enamel cup contains acidic beverages such as carbonated drinks, orange juice, lemon juice, or hot coffee, it will release excess lead, of course, enamel products cannot be heated. Damaged ones should not be used, and the harmful substances released should not be too much. If there are enamel utensils at home, it is best not to store acidic substances in the enamel utensils. Of course, leftover food from overnight should not be put into the enamel utensils, as it can easily react with the enamel and precipitate lead. It is best not to leave overnight food in daily life, even if the tableware is safe, it will not react with food, and eating it is not good for the body. Acids include vinegar, coffee, citrus beverages, tomato juice, kimchi, sugar water, etc.
Ceramics are utensils made by glazing porcelain plates and firing them at high temperatures. The high-temperature firing of ceramics also determines that their chemical properties are relatively stable and not easily reacted with acids. Of course, there are also qualified ceramic tableware here, but they cannot identify ceramics well. You can purchase tableware from legitimate channels. The heavy metals in ceramic cups are also present in the patterned pigments, so you can choose underglaze color or underglaze color. If you choose underglaze color, you can choose a manufacturer or brand you trust. The best place to come into contact with food is not decorated. Once cracks appear on the surface of porcelain or porcelain falls off, it should be discarded. Because these places are likely to release harmful substances such as lead and cadmium, the health of family members cannot be guaranteed.
