• Material selection: Ordinary clay can be used for pottery production, and the requirements are not as strict as those for porcelain.
• Molding: The molding methods of pottery are similar to those of porcelain, mainly including throwing, slip injection molding and pressing.
• Drying: Like porcelain, the pottery body also needs to be dried.
• Glazing or not glazing: Pottery can be unglazed to maintain the original earth color texture; it can also be glazed to increase beauty and practicality.
• Firing: The firing temperature of pottery is relatively low, generally between 800℃-1100℃.
III. Physical properties
1. Density and hardness
Due to the high firing temperature and high material purity, porcelain has a dense internal structure, high hardness and strong scratch resistance. Pottery is relatively rough, with low density and hardness, and is easily scratched.
2. Water absorption rate
The water absorption rate of porcelain is extremely low, almost zero, which makes porcelain difficult to absorb stains and easy to clean. Pottery has a high water absorption rate and is easy to absorb water and stains, so it needs to be more careful when cleaning.
3. Translucency
High-quality porcelain has a certain degree of translucency, especially thin-bodied porcelain, which is particularly translucent. Pottery has no translucency, which is due to its relatively loose internal structure.
4. Texture and sound quality
The texture of porcelain is fine and smooth, and it can make a crisp sound when knocked. Pottery, on the other hand, has a rough texture and makes a dull sound when knocked.