we can see the extraction vacuum indicator emit lights which indicates the vacuum process beginning. When the certain vacuum degree reached, it turns into the sealing and printing process. After all these steps, we can get well-packed products.
2. Nitrogen Filling Vacuum Packing
The clients need to purchase a nitrogen cylinder by themselves if they choose this packing method. There is a pipe on the packing machine which is used to connect with the nitrogen cylinder. The packing operation