Malvern Instruments: The Zetasizer Nano is an analytical tool for the paints and coatings industry that offers both zeta potential and particle-size measurement (in the range 0.6 nm to 6 microns). It is an ideal instrument for the optimization of formulation performance of both stability and surface finish. Photon correlation spectroscopy, the particle-sizing technique used by the Zetasizer Nano, offers rapid measurement with minimal sample preparation.