QB/T 2173: QB/T 2173 (拉链试验方法)
A Chinese standard of test methods for zippers. It describes procedures for measuring strength, cycle life and colour fastness, including specimen size, clamping, speed and evaluation. Standardised methods allow laboratories and factories to compare results and resolve disputes objectively. The standard also covers conditioning and reporting requirements. Test equipment must be calibrated, and records are retained so that results can be traced to production lots.