Method and device for determining the wettability of a moving surface and the use thereof

摘要

A stream (3) of liquid (SOL) is applied with a surface voltage to a substrate (8) that moves in relation to the SOL in a plane running crosswise to the SOL. The width of a trail of liquid (4) is measured directly after applying the SOL to the substrate and with a clearance from the SOL's point of impact on the substrate so as to determine wettability. An independent claim is also included for a device for determining wettability of a substrate's surface with a dosing device for applying a stream of liquid with a known surface voltage to a substrate while forming a continuous trail of liquid.