GB/T 21868.4-2008 《Pigments and extenders - Methods of dispersion for assessment of dispersion characteristics - Part 4:Dispersion using a bead mill》 Related products

This standard specifies a test method for the dispersion of pigments and fillers using the sanding method, suitable for low to medium viscosity grinding materials. This method is suitable for grinding systems that allow the free movement of the sanding balls and needs to be used in combination with the assessment method in GB/T 21867. This standard emphasizes the importance of low viscosity paint-based systems in the dispersion process and states that results between different dispersion methods cannot be directly compared. The sanding method is flexible and suitable for routine quality control of pigment dispersion performance.