DS/EN ISO 23321 "Solvent for paints and varnishes - de-saline water for industrial applications - Specification and test methods" specifies the technical requirements and test methods for de-saline water used in the production and application of paints and varnishes. The standard specifies the physical and chemical performance indicators of de-saline water, such as conductivity, ph value and total organic carbon content, to ensure that its mass is suitable for industrial coatings systems. The standard also details the detection methods and operation procedures to provide industrial users with a reliable basis for quality control.