Division 2.5 Viscosity and surface tension

For liquid formulations the viscosity shall be determined at two shear rates and at 20°C and 40°C and reported together with the test conditions. The surface tension shall be determined at the highest concentration.

For liquid plant protection products containing ≥10 % hydrocarbons and for which the kinematic viscosity is less than 7 × 10^– 6 m²/sec at 40 °C the surface tension of the neat formulation shall be determined at 25 °C and reported.