Ceramic production process

The manufacturing process of ceramics is as follows:

1, mud exercise. Porcelain stone is taken from the mining area, and it is broken into egg-sized pieces by hand hammer, then smashed into powder by water hammer, washed, removed impurities and precipitated into brick-like mud blocks.

Then add water to the mud and stir to remove the slag, rub it with both hands or step on it with your feet, and squeeze out the air in the mud to make the water in the mud uniform.

2. Blank drawings. Throw the clay ball into the center of the turntable of the pulley car, and draw the rough shape of the blank by bending, stretching and shrinking with this method. Blanking is the first process of forming. First of all, you should be familiar with the shrinkage of mud.

3. Print blank. The shape of the stamp is formed by rotary cutting according to the arc of the internal shape of the blank. Cover the semi-dried blank on the mold, press it evenly on the outer wall of the blank, and then demould it.

4, beneficial to the blank. It is a high-tech process to cover the blank on the bucket of the pulley car, turn the wheel and cut it with a knife to make the blank have a proper thickness and a smooth surface. Beneficial blank, also known as "trimming blank" or "spinning blank", is the key link to finally determine the shape of the object, making the surface of the object smooth, coherent and regular.

Internal and external repair is an extremely important molding technology in Jingdezhen porcelain making process, which is superior to other kiln systems and is a unique technical guarantee for forming Jingdezhen ceramic style.

5. Dry the blank. Put the processed blank on the wooden frame to dry.

6. Carving. Carve patterns on the dry blank with bamboo, bone or iron knife.

7. glaze. Ordinary round utensils are glazed or glazed. Glaze spraying of knives or large circular machines. Most ceramic products need to be glazed before they can be fired in the kiln. The glazing process seems simple, but it is an extremely important and difficult process to master.

It is not easy to make the glaze layer of each part of the blank uniform and appropriate in thickness, but also pay attention to the different fluidity of various glazes.

8. Kiln burning. Firstly, ceramic products are put into a sagger, which is a container for firing ceramic products and made of refractory materials. Its function is to prevent direct contact between porcelain blank and kiln fire and avoid pollution, especially for firing white porcelain.

9. painting. Over-glaze colors, such as multicolored and pastel colors, are painted on the glazed surface of fired porcelain, filled with colors, and then fired in a low-temperature red furnace at about 700-800 degrees.