GB/T 3810.10 - 2016 specifies the determination method of wet expansion of ceramic tiles. As one of the series of test methods, it simulates the use of ceramic tiles in a humid environment. The standard specifies the test equipment, such as high-precision measuring tools, constant humidity devices. Detailed description of sample preparation, including dimensional measurement, quantity requirements and pretreatment. During testing, the sample is placed in a specific Humidity environment and the dimensional change is measured regularly. The wet expansion value is determined by calculating the dimensional change rate. The standard provides a basis for evaluating the Stability of ceramic tiles under the influence of Humidity, and helps construction projects and consumers choose products that can adapt to humid environments and avoid the impact of wet expansion and deformation.