The main principle of the leveling agent is to migrate to the surface of the paint film to form a single molecule film with uniform surface tension which does not change with the coating film forming process. According to the principles of thermodynamics, substances that satisfy these needs usually have the following two characteristics:

 than system lower surface tension

 the compatibility with system co., LTD

The combined action of the above two points leads to the spontaneous migration of the leveling agent to the surface of the paint film when it is added to the coating system, and the formation of a single molecular film with a fixed uniform surface tension on the surface. The monomolecular film ensures that the surface tension of the paint film does not change with the change of the paint film, thus ensuring a flat surface.

Therefore, leveling velocity is related to viscosity, surface tension and film thickness. The lower the viscosity, the shorter the leveling time; The thicker the film thickness, the shorter the leveling time; The higher the surface tension, the greater the leveling force.