Duck sauce made of pure aluminum foil vacuum packaging bag or transparent plastic?
A good vacuum packing is recommended.
I did, I saw, salted duck, beef and other good packaging, is the use of the former.
PET thin film / foil / nylon //PE thin film, it is best for the duck packaging, the longest period of hedging. Of course, there are some other place form, slightly reduce some costs, such as the PET// //PE aluminum foil film, but the effect was not as good as the former good bag, a bag to reduce the cost of not much, but the effect is significantly reduced, so it is recommended to use the former.
