We often hear about the common word like “ceramics”, what is ceramic, how is porcelain and how to distinguish them? We should learn carefully to know how to choose and distinguish poor quality ceramics.
- Pottery is a type of item, in building buildings; palaces and even water troughs, household items;… more than 25,000 years after the invention of fire and leaving the cave. People mention two ways of making pottery, which are classical ceramics and unburnt pottery.
- Porcelain is a form of ceramic material created by heating raw materials, usually consisting of clay in the form of kaolin, in a furnace with temperatures around 1,200 ° C (2,192 ° F) and 1,400 ° C (2,552 ° F). The toughness and luminosity of porcelain arises mainly from the formation of glass and mineral mullite in sections that are heated at high temperatures.
Ceramics have a lower firing temperature than ceramics. Porcelain is only heated at the highest level of 1300 degrees Celsius, usually gas furnaces only burn to 1280 degrees Celsius. If the temperature is raised even higher, the product will be distorted, warped, or cracked. Ceramics have a lower firing temperature, only about 700 – 800 degrees.
Pottery is a raw material that has been heated through the fire but has no glaze. The material is usually raw. If the ceramic is glazed, it must be called porcelain.
Ceramics are products made of clay and its mixtures with inorganic or organic additives, heated through fire. And in a broad sense, ceramics are products produced by heating powdered raw materials including natural minerals and synthetic inorganic substances, including metals.
Depending on the raw materials and the technique of processing the raw materials, different baking methods (temperature) create different types of pottery, the most common are: terracotta, brown china, porous ceramic, white china. ceramic wares, porcelain … Thus, pottery is a common name; and porcelain is one of the products of pottery.
Ceramics and porcelains can be glazed, or not (there are technical ceramics without glazing); and if it is based on the heating temperature for identification it is sometimes not correct, for example, china (raw ceramic), sometimes heated at a higher temperature than the ceramic it can only be crooked, or refractory ceramic, it is fired. at high temperatures> 1350 ° C, but it is still called ceramic.
- Pottery is often used in home decoration, flower vase, water hyacinth or beautiful ceramic paintings, bricks …
- Porcelain is used in the kitchen, home appliances, dining tables, tea sets, cups, spoons,…
Because it is heated at high temperature and enameled; in terms of safety and not toxicity; we should use porcelain to ensure the safety of health for family members.
To distinguish, we use a chopstick or a metal bar to gently tap the product. Porcelain products will let in a longer sounding sound. Or you can check the enamel on the product.
Pottery is made from less selective materials than porcelain; so it usually has higher porosity; poor heat-holding capacity; so the entire product must be enameled; and the glazed glaze is usually not sealed.
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