Surface test of motor vehicle interior materials - Finger nail test
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Our laboratory performs testing in accordance with the BMW standard GS-97034-2 under accredited procedures. This test, commonly referred to as the fingernail test, is used for the standardized determination of the surface resistance of automotive interior materials to mechanical contact stresses caused by sharp-edged or pointed objects. The methodology is designed to evaluate the durability of painted, coated, uncoated, and laminated surfaces typically used in vehicle interiors.
During the fingernail test according to BMW GS-97034-2, standardized specimens are examined under defined test conditions. A standardized plastic test stylus is moved in a defined linear motion across the material surface to simulate localized, sharp-edged mechanical stress. Test parameters—such as applied force, speed, and type of movement—are specified to ensure reproducible and comparable results.
After testing, the surface is assessed to determine whether and to what extent damage has occurred, such as scratches, grooves, or material displacement. The results provide a reliable basis for evaluating the suitability of interior surface materials for everyday mechanical exposure in automotive applications.