What is the difference between a backingless foil and a backing foil?
There is a layer of film on the ordinary aluminum foil, such as paper. In order to increase the strength, reduce the leakage caused by tiny holes in the surface of aluminum foil
The surface has a very small hole, easy to reveal the smell, but can be covered in any shape on the surface of the object, very soft.
No backing: is the ordinary aluminum foil, a tin foil, such as high-grade wine bottle of aluminum foil
The most common is the layer inside the cigarette box. Good sealing performance, especially for the smell of good sealing
