There are three major categories: the plasticity of raw materials, flux raw material, raw material barren.
Plasticity of raw materials: to make mud to form a certain shape, such as kaolin.
The role of flux of the starting material: mainly used to produce the glaze, glazed bright, good whiteness, such as feldspar, plus lower firing temperature in the raw material.
Role barren raw materials: ceramic forming the skeleton in the firing process, such as quartz
