This standard specifies a test method for systematically evaluating the effects of liquids (such as petroleum derivatives, organic solvents, or chemical reagents) on rubber materials (e.g., swelling, shrinkage, or chemical erosion) by immersing specimens of vulcanized rubber or thermoplastic rubber in specific liquids and comparing the changes in their physical properties before and after immersion. The standard details the procedures for specimen preparation, conditioning, and immersion testing, as well as the detection methods for assessing changes in key indicators such as volume, mass, dimensions, hardness, and tensile properties. In terms of testing instruments, in addition to conventional constant-temperature immersion containers, analytical balances, and durometers, the standard also supports the use of dedicated single-sided immersion devices to simulate specific working conditions where the material is exposed to liquid on only one side. This method provides a core basis for evaluating the key media resistance properties of rubber products such as automotive oil seals and hydraulic hoses.