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How to distinguish the quality of packing materials

How to distinguish the quality of packing materials

In the production of packaging, we have to distinguish how good it is to pack recycled materials. Next we look at our analysis for you:
First of all, look at the luster and color of the recycled material, of course, the quality of the gloss is good; the permeability is better than the impermeability.
Secondly, look at the section of the cut. If the section is rough and no luster, the material quality will be poor.
Then you can use your teeth to bite yourself to experience the strength of the new material. If it is relatively soft, there must be added PE.
After that, it was ignited by a lighter to smell its smoke. The colored toner emitted a great smell.