What's the difference between coarse pottery and fine pottery?

The difference between coarse pottery and fine pottery is as follows:

1, the raw materials of coarse pottery casserole are mainly coarse sand and clay, the surface is rough, bluish gray, the quality is dull, the heat transfer is uniform, the heat preservation performance is good, and it is suitable for stewing.

2. The raw material of fine pottery casserole is mainly fine sand, with fine surface, rich color and fast heat transfer, which is suitable for stir-frying.