The ISO 8780-4 standard specifies a method for the dispersion of pigments and fillers using a bead mill. This method is suitable for low- and medium-viscosity grinding materials, through which the dispersion of pigments can be efficiently carried out. The standard requires that the evaluation method in ISO 8781 be used in conjunction with ensuring that an agreed system of low-viscosity gluing agents is used to test for dispersion. This method provides a technical basis for the evaluation of colorants with higher viscosity and is not directly related to formulation optimization for Miscellaneous dispersion techniques.