First of all, we need to use the method of watching to check whether the surface brightness of the aluminum foil packaging bag is dull, because in many professional fields, the brightness of the surface of the aluminum foil packaging bag is far less than that of the aluminum coated bag, and the reflective function is not as good as that of the aluminized film products. At this time, we can also observe the aluminized bag, and if the production process is good, people can be exposed, But here we need to pay attention to is that the extinction film aluminum plating need to be excluded
Under normal circumstances, the handle of aluminum foil packaging bag is relatively thick, and has a certain degree of straightness and firmness. After being lifted by hand, we can feel that it is much heavier than ordinary packaging bag, and the texture of aluminum coated bag is much lighter than that of aluminum foil package, and the texture is soft
Twisting method, usually after the later twisting, the aluminum foil packaging bag will produce more obvious coalescence, and is not easy to rebound, and its aluminum layer will also appear a lot of fracture lines; while the aluminum coated bag after twisting, it will not produce kink, but will also quickly pop open, and there is no obvious crack on the surface of the bag body
Using the method of burning, we found that the ignition point is not easy to burn, and the aluminum layer will roll back because of heat. After burning, some gray aluminum slag will be left because of the medium of aluminum foil itself
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