The Elcometer 1540 Adhesion Tester is a simple instrument for quickly determining the coating adhesion of a large variety of paints up to 50µm (2 mils) thickness.

Surface

Typical description of result

The edges of the cuts are completely smooth, none of the squares of the lattice is detached.

Detachment of small flakes of the coating at the intersections of the cuts. A cross cut area not significantly greater than 5%, is affected.

The coating has flaked along the edges and/or at the intersections of the cuts. A cross cut area significantly greater than 5%, but not significantly greater than 15%, is affected.

The coating has flaked along the edges of the cuts partly or wholly in large ribbons, and/or it has flaked partly or wholly on different parts of the squares. A cross cut area significantly greater than 15%, but not significantly greater than 35%, is affected.

The coating has flaked along the edges of the cuts in large ribbons and/or some squares have detached partly or wholly. A cross cut area significantly greater than 35%, but not significantly greater than 65%, is affected.

Any degree of flaking that cannot be classified even by classification 4 (1B).