All our produced paper bags must go through the strict quality control. In addition to 100% check, we implement pull strength testing and fatigue testing by sampling to make sure their best qualities. Therefore, you will gain the extra values from our produced paper bags which the other competitors can not offer. It means that our produced paper bags can carry more weights. Please takes a close look at those mentioned sampling tests in details below:
The standard of pull strength testing:

The twisted paper handles are pulled by 20KGs or more of strength like below pictures. As a result, the twisted paper handles can carry the load of 30 KGs and more from the actual testing. (Method: sampling)

The standard of fatigue testing:

The paper bag carrying 5 KGs’ load is pulled up and down continuously like the below pictures at least 800 times. As a result, the twisted paper handles do NOT break.

Method: sampling
The fatigue strength testing

I agree