The quality inspection of Engraved Logo metal zipper slider puller (i.e. metal zipper slider puller with engraved logo) of luggage can carry out in the following aspects: First. Appearance Quality Inspection Second, functionality test Third.Corrosion resistance and safety testing Fourth. Size and Specification Testing Fifth. Comprehensive Evaluation and Test Report After completing the above tests, … Continue reading How to check the quality of engraved logo metal zipper slider puller