ISO 787-7:2009 "General test methods for pigments and fillers, Part 7: Determination of residues on a sieve, water method, manual procedure" specifies a method for the determination of residues on a sieve of a pigment or filler sample dispersed in water. This method involves suspending the sample in water and sieving it through a sieve by manual procedure to determine the percentage of mass residue on the sieve. This method differs from the mechanical flushing procedure (ISO 787-18), so the method used needs to be clearly identified in the specification sheet and noted in the test report to ensure the accuracy and conformity of the test results. This standard provides a reliable means of determination for the quality control of pigments and fillers.