Лако-красочные материалы — производство

The ease of dispersion of pigments can be tested by dispersing a pigment in a given paint medium in an oscillatory shaking machine (for low viscosity medium) or automatic muller (for high viscosity medium). The time (in case of an oscillatory shaking machine) or the number of cycles at constant pressure (for an automatic muller) that are required to obtain a specified fineness of dispersion as indicated on a grindometer gauge may be used for rating the relative ease of dispersion. A change in tinting strength for identical composition and dispersion conditions may also be used as a criterion for testing relative ease of dispersion for colored pigments.