Kaolin bentonite has small particles, strong plasticity and large sintering shrinkage. Xuyong soil is mainly hydrated kaolinite with tubular crystal structure, so it has high water content and large sintering shrinkage. In addition to illite, porcelain stone generally contains timely minerals, and its characteristic is that it can be fired into porcelain alone. However, the temperature of porcelain is low, and if the temperature is not properly controlled, the product is easy to deform. Clay casserole can transfer the external heat energy to the internal raw materials in a balanced and lasting way. A relatively balanced ambient temperature is conducive to the mutual penetration of water molecules and food. The longer this mutual infiltration lasts, the more delicious ingredients will overflow, the fresher the soup will taste and the crisper the stewed food will taste.

Casserole is a kind of cooker. Traditional casserole is a ceramic product made of raw materials that are not easy to transfer heat, such as seasonable, feldspar and clay. Fired at high temperature, it has the characteristics of air permeability, adsorption, uniform heat transfer and slow heat dissipation. The recipes that depend on casserole include casserole chicken, casserole tofu, casserole fish head and so on.