ISO 2808 Paints and Varnishes - Standard Test for Determination of Film Thickness

EUROLAB laboratory provides testing and compliance services within the scope of ISO 2808 standard. This standard describes methods for measuring the thickness of coatings applied to a substrate. Methods for determining wet film thickness, dry film thickness, and film thickness of uncured powder layers are described.

In all mechanical methods, the substrate surface is contacted by one part of the measuring device through the coating, and the surface of the coating is contacted simultaneously or subsequently with another part of the device. Wet film thickness is the height difference between these two points of contact that can be read directly.

The mechanical principle is suitable for all film-substrate combinations. The substrate must be flat in at least one direction in the area where the measurement is taken. Curvature of the surface in a single plane is allowed.

Classification as a destructive or non-destructive method depends on:

• The rheological properties of the coating material;
• The nature of the wetting contact between the contact surfaces of the measuring device and the coating material;
• Whether thickness measurements will make the pavement fit for its intended purpose.

All mechanical methods involve systematic error, as the possibility of pigment particles remaining between the indicator and the substrate cannot be excluded. The displayed film thickness is smaller than the actual wet film thickness at least by the mean diameter of the pigment particles.

EUROLAB assists manufacturers with ISO 2808 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.