Cross-cut test
The cross-cut test is a method for estimating the resistance of a coating to separation from the substrate. For this purpose, sharp cutting edges are used to cut lines with defined spacing through the coating into the substrate in the form of a grid.
Cutting tools with a defined shape of the cutting edges depending on the coating thickness are used for the test. A distinction is made with regard to the cutting devices - single-cutting tools and multiple-cutting tools. A single-cutting tool as well as the multiple-cutting tool are suitable for all types of coatings and substrates. It is important to ensure that all cuts are made on or in the substrate. However, the depth of penetration into the substrate must be as small as possible.
The appearance of the surface can then be assessed visually and the cross-cut values from 0 to 5 given. In some cases, a yes/no assessment is also sufficient. In the case of multi-layer systems, it is additionally indicated between which layers the separation takes place.
Fundamentals
Technical equipment
Single-cutting tool
- Cutter with rigid blade and a V-shaped cutting edge
- correct cutting guide and cutting distance with templates
- Cutting distance 1 mm, 1.5 mm, 2 mm and 3 mm
Multi-cutting tool with handle
- Tilting cutting head for optimum alignment on the test surface
- Cutting head with six cutting edges as well as a guide edge on the left and on the right
- Different cutting heads with 1 mm, 2 mm and 3 mm cutting distance
Sample preparation
Test conditions
Standards
Results
Dr.-Ing. Marcus Schoßig
Phone: +49 (0)3461 30889-53
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