This part of EN ISO 8780 specifies a method for the dispersion of pigments and extenders using an automatic muller. It is suitable for comparing small samples in the quality control of pigments. This part of EN ISO 8780 is for use in conjunction with the methods of assessment described in EN ISO 8781, using an agreed binder system of high viscosity free from volatile solvents. It should be read in conjunction with EN ISO 8780-1.