... viscometer, 25°C, 25,000 - 35,000MPa.s 2) Fineness of grind: Features: 1) Viscosity: NDJ-79 viscometer, 25°C ... , 25,000 - 35,000MPa.s 2) Fineness of grind: tested with QXD-50 scratch board fineness gauge 3) Fired thickness: measured with electronic outside ...