Application

Constant and defined film thicknesses is a precondition for testing and analysis of coating materials and coatings. Many properties of these materials depend on the film thickness.

It is important to know that for physical reasons the maximum achievable wet film thickness is not equal to the gap height. The following guidelines apply:

• 15 – 100 µm (0.59 – 3.94 mil) (Gag height), about 50 % (Wet film thickness)
• above 100 – 300 µm (3.94 – 11.81 mil) (Gag height), about 60 % (Wet film thickness)
• above 300 – 500 µm (11.81 – 19.69 mil) (Gag height), about 80 % (Wet film thickness)
• above 500 µm (19.69 mil) (Gag height), up to 90 % (Wet film thickness)

For the choice of the correct gap height please also consider that the dry film thickness obtained can be less than the wet film thickness depending on the weight percent of solids.

There are wedge-shaped and uniform applications. For wedge-shaped applications, we offer the ZUA 2000. There is a wide choice of uniform applicators from wire-bar, profiled, semi-circular, 4-sided up to universal applicators.