How to judge the quality of paper box

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There are some ways to judge the quality of paper box:
weight method
The paper box is weighed on the electronic scale to see how heavy it is. Paper box is priced according to grams, grams of higher quality is better.




pressure method
Hold the paper box between your fingers to see which one will hold up better. But this is not accurate, we can not really distinguish between the good and bad paper box. Because the paper box is easy to damp, damp after the original good quality paper box is soft.



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