Fineness Of Grind Gages

Fineness of Grind Gages

Fineness of Grind Gages are BYK-Gardner testing instruments used to evaluate the fineness of grind and detect the presence of coarse particles or agglomerates in dispersions. These instruments are essential for ensuring that pigments, fillers, extenders, and other solid particles are properly dispersed in paints, coatings, inks, varnishes, resins, pastes, and other liquid or semi-solid materials.

In coating and ink production, dispersion quality directly affects color strength, gloss, opacity, hiding power, surface smoothness, stability, and final product appearance. Fineness of Grind Gages help users determine whether the milling or grinding process has reached the required target. If coarse particles or agglomerates remain, the final coating may show defects such as rough surfaces, poor gloss, weak color development, sedimentation, or inconsistent ink transfer.

Fineness of Grind Gages consist of a steel block with one or more grooves that gradually decrease in depth from the deepest end to zero. The sample is placed at the deepest end of the groove, then drawn down with a scraper to form a thin film. The point where coarse particles or speckle patterns appear is used as the grind reading on microns, mils, Hegman, or NPIRI scales depending on the gage type. This product is suitable for quality control, R&D, formulation development, batch comparison, pigment dispersion evaluation, and testing according to ASTM D1210 and ISO 1524.