Standard HG/T 4655-2014 "Spinning & weaving dyeing and finishing aids, leveling agents for polyester" specifies the requirements, test methods, inspection rules and requirements for marking, labeling, Encasement, transportation and storage of leveling agents used in the dyeing process of polyester fabrics. This standard applies to ensure the mass Stability and conformity of leveling agent products during the dyeing process of polyester fabrics. Through the various test methods specified in this standard, such as high temperature dispersion, slow dyeing performance, dyeing transfer performance, etc., to ensure that the leveling agent can be evenly dispersed, effectively dyed, and does not produce stains during the dyeing process, so as to achieve the desired dyeing effect.