The GB/T 12598-2023 standard specifies a method for the determination of the infiltrated ball rate and the post-milled ball rate of ion-exchanged Resin. This standard applies to the determination of the infiltrated ball rate and the post-milled ball rate of the unused wet spherical ion-exchanged Resin. For the determination of the post-milled ball rate of the dry spherical ion-exchanged Resin, refer to Execution. The determination process involves applying the action of acid-base concentration and rolling pressure and friction force to the ion-exchanged Resin, so that it can roll freely and separate after drying, and finally obtain the mass percentage of the spherical particles. The implementation of this standard helps to evaluate the shape retention ability of the ion-exchanged Resin, providing a reliable basis for its performance in practical applications.