Double Sporting Goods Co Ltd

Quality Control

QC/Technical Support Inspect all raw and auxiliary materials Debug and adjust main equipment controllers regularly Debug and adjust testing equipment regularly Individually inspect bladders for roundness and airtightness Vulcanization testing Test finished sports balls for leakage, bounce, and roundness Final checking on products before packing Reject all defective products QC Staff More than 99 Our QC member strictly check products one by one Strict checking of finished products Procedures/testing Details Purchased materials are tested by our QC staff according to national standards Strict quality control by production staff Semi-finished products, internal bladders, wire winding and valves must be physically inspected All sports balls are inflated and left idle for over 48 hours in order to test airtightness, roundness, bounce, and durability Other Information Counters for vulcanization Chemical analysis instruments Physical analysis instruments Flexibility testing instruments Durability testing instruments Roundness testing instruments Air pressure testing instruments