However, if you are vigilant when buying and choose the correct cleaning and maintenance methods, colorful ceramic cups can still be used in daily life with peace of mind.
trait
Glaze is a continuous glassy layer attached to the surface of ceramic body, or a mixed layer of glass body and crystal. Glaze may be made of calcium-containing stones and charcoal ash used in ancient stone cooking, or it may be consciously made of shell powder inspired by the beautiful texture on the shell surface.
In fact, as early as the Shang Dynasty more than 3,000 years ago, our ancestors had learned to use rocks and clay to make glazes to decorate ceramics. Later, ceramic artists used the phenomenon that kiln dust naturally fell on the green body to synthesize glaze, and then used plant ash as the raw material for making glaze. Glazes used in modern daily-use ceramics production are divided into lime glaze and feldspar glaze.
Lime glaze is made of glaze fruit (a natural mineral raw material similar to porcelain stone) and lime fly ash (calcium oxide as the main component). Feldspar glaze is mainly composed of quartz, feldspar, marble and kaolin. Adding metal oxides or infiltrating other chemical components into lime glaze and feldspar glaze will change into various glaze colors.
Lime glaze is made of glaze fruit (a natural mineral raw material similar to porcelain stone) and lime fly ash (calcium oxide as the main component). Feldspar glaze is mainly composed of quartz, feldspar, marble and kaolin. Adding metal oxides or infiltrating other chemical components into lime glaze and feldspar glaze will change into various glaze colors.
Generally, the thickness of the blank glaze is 0. 1 cm, but after firing in the kiln, it adheres closely to the porcelain body, making the porcelain dense, soft in luster, impermeable to water and gas, and giving people the feeling of being as bright as a mirror. At the same time, it can improve the use strength and chemical stability, and play a role in preventing pollution, facilitating cleaning and reducing corrosion.
Tang Sancai is a kind of low-temperature glazed pottery. Adding different metal oxides into the colored glaze, after firing, various colors such as light yellow, ochre yellow, light green, dark green, sky blue, brown red and eggplant purple are formed, but most of them are yellow, brown and green. The glaze of Tang tri-colored glaze has the effect of changing shades, mutual penetration and mottling.
In the mutual reflection of colors, it shows magnificent artistic charm. Tang Sancai was used as a funerary object. As a funerary object, its practicality was far less than that of celadon and white porcelain that had appeared at that time because of its crisp fetal quality and poor waterproof performance.