JIS K5101-14-2-2004 "Pigment Test Methods, Part 14: Determination of Residues on Filters, Second Water Saving Method, Mechanical Flushing Procedure", specifies the method for the determination of pigment filter residues by aqueous mechanical flushing. The standard specifies the requirements for test equipment and sample preparation, specifies the operation procedures such as water flow speed and flushing time of mechanical flushing, as well as the steps of residue collection, drying, weighing and calculation, and provides technical specifications for the accurate determination of residue content on pigment filters and the evaluation of pigment purity.