Behaviour of lubricating greases in the presence of water. The behaviour towards distilled water is analysed under static test conditions (part 1) at 40 °C or 90 °C or dynamic conditions (part 2) at 40 or 80 °C. In case of static analysis the appearance and adhesion of the grease on a glass strip is checked visually; in case of dynamic analysis the amount of grease dragged out of the ball bearing by means water spray is measured gravimetrically. DIN 51807 T1 and T2.