Who greater shrinkage between china clay and fire clay?

China clay, or kaolin, typically experiences greater shrinkage compared to fire clay during drying and firing processes. This is primarily due to its finer particle size and higher plasticity, leading to more significant volume changes as moisture evaporates. In contrast, fire clay, which is coarser and contains more alumina, has lower shrinkage rates, making it more stable under high temperatures. Thus, fire clay is often preferred for applications requiring minimal shrinkage.