One, Class A failed. The carton cannot fulfill the function of protecting or identifying the contents.
1. Joints fall off;
2. The size exceeds the allowable error range;
3. The quality is lower than the specified minimum value;
4. Indentation lines are broken or the paper surface is broken;
5. The surface is torn, pierced, holes or cover flaps are regularly produced with excess cardboard pieces stuck;
6. There are errors in printing, incomplete printing, or color patterns;
7. Pollution caused by external substances.
Second, class B failed. Cartons are incomplete or have problems.
1. Incomplete adhesion of the seams, incomplete tape joints, or insufficient joint tack;
2. Slot into the edge of the side of the carton;
3. Cover plate can not butt, the gap is greater than 3mm;
4. Cardboard moisture content is higher than 20% or lower than 5%;
5. Carton bending at non-indentation;
6. Incomplete printing or blurred graphics
7. The carton did not take anti-skid measures as required.
Third, the C class failed. The appearance of the carton is not good, but its function is not affected.
1. Slotting or carton die cutting;
2. The cardboard surface has a splay-like unevenness that affects the quality of printed graphics;
3. The box surface has pollution spots;
4. Shallow scratches or marks are wiped off.
The above unqualified quality levels are: Class A 1.0; Class B 4.0; Class C 6.5.