Box Gluing Quality

Gluing can be checked through visual inspection, measuring magnifier and damage testing.
1. Adhesive joints are neat & trim, with tolerance of 0.3mm.
2. No adhesive residue, no glue failure
3. Sticks firmly，to the extent that ungluing peels off the paper(with damage area no less than 80%).
4. Paper box shapes stiff & smooth, no warp or tilt.
5. Box cap fits properly, no popping out.