1. Printing quality: the pattern and handwriting are clearly printed, the chromaticity is consistent, and the brightness is bright; the printing position error does not exceed 7mm for large boxes and 4mm for small boxes;
2. Sealing quality: there are no loopholes around the box, and there is no unevenness and separation after the lids are closed;
3. Dimensional tolerance: The inner diameter of the box and the design dimensional tolerance should be kept within ±5mm for the large box and ±3mm for the small box, and the overall dimensions are basically the same;
4. The number of times of cover folding: the corrugated box cover is folded more than 5 times by opening and closing 180 degrees, and the total length of cracks in the surface layer and inner layer of the first and second-class boxes, and the inner layer of the third-class box is not more than 70mm;
In addition, the joint specification is required, the edges are neat, the corners are not overlapped, and the box surface is not allowed to have obvious damage or stains, etc.
