Water absorption testing for ceramic tableware measures how much water a ceramic body can absorb under specified test conditions. The common testing method involves drying the ceramic sample to a stable weight, soaking it in water according to the testing procedure, and calculating the percentage of weight increase after water absorption.

Water absorption is an indicator of the density and structure of the ceramic body. In general, ceramic products with higher firing temperatures and denser structures tend to have lower water absorption, while products with more internal pores or insufficient firing may show higher absorption levels. Different ceramic materials, such as porcelain, stoneware, and earthenware, have different water absorption characteristics due to differences in raw materials and firing processes.

For buyers, water absorption can be used as a reference when evaluating ceramic material performance, but it should not be considered the only quality indicator. Product selection should also consider factors such as thermal shock resistance, mechanical strength, glaze quality, and food contact safety requirements.