Cracking in ceramic tableware is usually related to multiple factors, including the ceramic body composition, forming process, drying conditions, and firing process. In many cases, cracks are caused by internal stress or uneven shrinkage during different production stages rather than a single issue.

During forming and drying, factors such as uneven moisture removal, inconsistent wall thickness, or differences in body density may increase the risk of cracks. During firing, heating rate, soaking time, cooling process, and temperature distribution inside the kiln can affect the final product condition. In addition, poor compatibility between the ceramic body and glaze expansion rates may result in glaze cracking.

For buyers, identifying the location and timing of cracks is important for finding possible causes. Body cracks, glaze cracks, and cracks caused by thermal shock may require different solutions. For OEM and ODM projects, product stability usually needs to be confirmed through sampling, firing adjustments, and performance testing.