Polar Single Chamber Vacuum packing How can vacuuming operate? Vacuum means ‘with out air’. A vacuum chamber machine eliminates ninety nine.eight% from the air through the chamber and package. It then seals the packaging airtight. When you have a chamber-type machine: Buy a chamber-kind bag (mesh-less style and design). https://www.linpack.com/news/choosing-the-right-tray-sealing-machine-for-your-business