This part of ISO 8780 specifies a method for the dispersion of pigments and extenders using an oscillatory shaking machine. The method is suitable for the preparation of dispersions of several samples in the quality control of pigments. This part is for use in conjunction with the methods of assessment described in ISO 8781, using an agreed binder system of low viscosity. It should be read in conjunction with ISO 8780-1. NOTE 1 The advantage of the oscillatory shaking method is that several batches of small amounts of mill base can be tested simultaneously in a closed system where solvent loss is minimized. This method is restricted to low-viscosity mill bases allowing free movement of the grinding spheres (see 7.1). It is not suitable for optimizing mill base formulations for other dispersing techniques.