This standard specifies the requirements, test methods, inspection rules and marking, packaging, storage, etc. of perchlorethylene paint thinner. This standard applies to diluents prepared from solvents such as esters, ketones and aromatic hydrocarbons. This diluent has good dilution capacity and appropriate evaporation speed. It is mainly used to dilute various perchlorethylene varnishes, enamels, primers and putty, etc.