Coil Anwendung | Test Methoden | BYK Additives

Test method to evaluate pigment stabilization by blending the paint shortly before application and by the rubout test. A paint sample is split into two parts after storage over night at room temperature. One part is blended with a toothed blade for one minute at 6 m/s (this simulates the high shear stress at the coil coating line during application). The other part is not blended. The two parts are applied side by side on a panel with a wire bar coater. A color difference is visible between the blended and the not blended sample. Then the rubout test is performed and shows also color differences. The panel is then baked (320 °C, 30 s). The poor performance of the paint is due to the insufficient stabilization of the pigments. The same procedure is repeated with another paint sample where the pigments are perfectly stabilized by additives: No (or only minor) color differences are visible between the blended and the not blended sample and in the rubout test. Learn more about Additives for Coil Coatings from BYK: https://www.byk.com/en/markets/coil-c...