n This is the most commonly used viscometer in the paint industry. Paint consistency is measured by its resistance to stirring by a two-vane paddle. The two vanes are offset to avoid channeling in viscous paints. Approximate weights are added to a platform on a string attached to a pulley which is connected to the paddle until a speed of 100 rpm is reached, generally measured by a stroboscopic timer. The grams required to reach this speed are then converted, by using a conversion table, to Krebs Units. (Paint and coating testing manual (Gardner-Sward handbook) MNL 17, 14th edn. ASTM, Conshohocken, PA, 1995). Viscometer.