How to punch a hole in the bottom of a porcelain bowl

1, punch a hole in the bottom of the porcelain bowl, you can use a punch, and add some water to the bottom of the cup when punching, otherwise the friction temperature will be too high. Before the operation, the cup can be soaked for a few days, so it is not easy to break. The space inside the cup should be filled with towels or newspapers, so that the stress points of the nails are not all at the bottom of the jar.

2. Porcelain is an object made of porcelain stone, kaolin, quartz stone and mullite. , its surface is coated with glass glaze or painted. Porcelain is fired in a kiln at a high temperature (about 1280℃- 1400℃), and the glaze color of porcelain surface will undergo various chemical changes due to different temperatures. Sintered porcelain tires generally contain less than 3% iron and are impermeable. Because of their low cost, wear resistance and impermeability, they are widely used by people all over the world. China is the hometown of porcelain, which is an important creation of the Han working people. The invention of porcelain is a great contribution of the Han nationality to world civilization. In English, China and China are the same word.

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