Why is the bottom of ceramic cup rough?

There is no glaze at the bottom of the bowl.

Ceramics is the floorboard of pottery and porcelain, and it is also a kind of arts and crafts in China. As early as the Neolithic Age, there were rough and simple painted pottery and black pottery in China. Pottery and porcelain have different textures and characteristics. Pottery, made of clay with high viscosity and strong plasticity, is opaque, with fine pores, weak water absorption and turbid tapping sound.

Definition:

Ceramic British ceramics; ; Ceramic pinyin táocí；; ; Ceramics is a general term for pottery and porcelain. Traditional ceramics, also known as ordinary ceramics, are products fired from natural silicates such as clay, while modern ceramics are also known as new ceramics, fine ceramics or special ceramics. Commonly used non-silicate chemical raw materials or synthetic raw materials.

Such as oxide (alumina, zirconia, titania, etc.). ) and non-oxides (silicon nitride, boron carbide, etc. Ceramics have many advantages such as excellent insulation, corrosion resistance, high temperature resistance, high hardness, low density and radiation resistance, and have been widely used in various fields of national economy.

Traditional ceramic products include daily-use ceramics, building sanitary ceramics, industrial fine arts ceramics, chemical stoneware, electric porcelain and so on. , various types, different performance.