A mar is more limited to a close to the surface change in gloss or color as a result of a material microcrack due to chronic internal stress and strain. The broader aspect of abrasion involves a more gradual removal of surface material with a moving contact force similar to a bearing and wear motion. These preceding failure mechanisms remain an ongoing research subject on the molecular plastics level. In plastics surface scratch and mar testing, there have been developed many different test approaches usually tailored to a specific end-use application. Stated simply, it is hard to use just one applied test to fully characterize a plastic surface scratch or mar. So, a good approach is to correlate applied test results with fundamental failure data on an ongoing basis. This is the best route to establish new scratch and mar testing equipment and methods. Qinsun multi-finger scratch/mar tester is designed for a variety of automotive interior materials, such as plastics, rubber, le...