We use following methods to determine the change of surface properties of powder materials:

Measurement of dynamic capillarity of powder materials – Washburn

The wettability of the PE powder is determined with a tensiometer from dynamic capillarity rising measurements according to the Washburn method. The internal norm was created according to this method and the suction of the material is determined as the time dependence of weight of the penetrating benzyl alcohol at 25 °C.