Use qualified supplier only;
Audit the supplier factory before cooperation;
Test the material before use it;
Ensure stable supply of qualified material.
Test every roll of melt-blown fabric before get into warehouse, and every roll has a unique identification label;
Earloop cord must be stretched to three times its length.
Nose clip has to be folded up to 50 times and no broken.
IPQC checking on each production line.
Randomly pick samples from each production line for testing of filtering efficiency, breathing resistance and pulling test for earloop.
100% Appearance inspection for all masks before packing.
Sample drawing for testing from each batch.