As a device specially used to evaluate the wear resistance and scratch resistance of material surfaces, paper clip scratch tester plays an important role in materials science, manufacturing and consumer products. Shanghai Qianshi Precision Electromechanical Technology Co., Ltd. was established in 2012. It focuses on the research, development, design and production of textile testing instruments, and provides textile testing instruments and services for academic research units and testing institutions. Shanghai Qianshi is one of the most competitive and R&D textile testing instrument manufacturers in China. The R&D team is composed of a group of experienced engineers. We are committed to serving customers wholeheartedly and striving to promote technological innovation of textile testing instruments. Working principle: The basic working principle is to conduct quantitative and qualitative tests on the surface of materials by simulating the scratching conditions that may be ...