Standard Method of test for Viscosity of Paints, Varnish, and Lacquer by Ford Viscosity Cup
|Publication Date:||24 December 1970|
This method covers the determination of the viscosity of paints, varnishes, lacquers, and related liquid materials with the Ford-type effux viscosity cup.
The cup-orifice combination (Ford No.2, No. 3, or No. 4) is selected to provide an efflux time within the range 20 to 100s. When the time of efflux is beyond this range, accurate temperature control is difficult. Any wide departure from Newtonian behavior might result in a lack of reproducibility because or the difficulty of judging the break in the stream.