August , 2024

Paints and inks often exhibit different shear rates from manufacturing to application. As typical non-Newtonian fluids, paints and inks show varying viscosity characteristics at different shear rates. Generally, paints are at a low shear rate when stored, transported, leveled, or sagged. They experience medium shear rates when pumped, dipped, or mixed at low speeds. During high-speed dispersion, rolling, spraying, and brush coating, they are subjected to high shear rates, generally ranging from 9000 s⁻¹ to 12000 s⁻¹. Therefore, understanding the rheological characteristics of paints or inks at such high shear rates requires the use of a cone-and-plate viscometer for measurement.

The BGD 182 Cone-and-plate Viscometer uses a specially angled conical spindle, which generates a very high shear rate on the sample under the high-speed drive of a stepper motor. It conforms to ISO 2884-1: "Paints and varnishes — Determination of viscosity using rotary viscometers — Part 1: Cone-and-plate viscometer operated at a high rate of shear."