Surface test of motor vehicle interior materials Determination of the scratch inclination
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Our test laboratory performs testing according to the BMW standard GS‑97034‑8 under accredited procedures. This scratch inclination test for automotive interior materials is used for the standardized determination of a surface’s tendency to develop scratches or streaks, thereby assessing the tolerance of the surface to mechanical stress. The methodology is specifically designed to evaluate coated, painted, uncoated, laminated, and textile interior surfaces that may come into contact with hard or sharp-edged objects such as rings, keys, or tools during everyday vehicle use.
During testing according to BMW GS‑97034‑8, standardized specimens are examined under defined boundary conditions (Erichsen scratch tester). The test stylus is moved across the component surface at a constant angle, defined speed, and stepwise varying load. Typical force and angle values are applied sequentially to evaluate the surface’s susceptibility to scratches or streaks and to analyze damage behavior. Test length, speed, and orientation are strictly defined to ensure reproducible results. Visible inspection and, where necessary, magnified assessment of damage are then performed, and the results are classified according to defined evaluation criteria.
The test results provide characteristic values for the scratch susceptibility of various materials and surface structures used in automotive interior components, particularly high-contact areas such as dashboards, door panels, or decorative elements.