GB/T 8291-2023 is a standard for the determination of residue on sieve in latex. It stipulates a unified method for determining the content of clots in latex, which is suitable for all kinds of natural or synthetic latex products. Detail the instruments and equipment required for the determination, such as specific specifications of sieve. Standardize sample preparation and operation procedures, and clarify the requirements for oscillation, filtrate and other links. By accurately measuring the content of clots, the mass of latex can be effectively evaluated, and the latex production and processing enterprises can control product quality, optimize production processes, and provide key data support for downstream users to rationally select latex.