Vacuum Sealing Machines remove the air from a bag and sometimes replace it with inert Nitrogen gas then hermetically seal the package to give long-term oxygen free protection to the contents. Conservation By Design has been the leading supplier of Vacuum Sealing Machines and Barrier Products to the Conservation profession for many years. They are widely used for numerous applications as noted below. All of these machines are fitted with a unique exhaust that allows extraction of potentially dangerous mould spores when dealing with old or wet books and documents.
CXD Vacuum Chamber Machines
A vacuum chamber removes the air out of a bag by use of a vacuum pump. On completion the bag is then sealed. Equipped with a clearly laid out and easy to program digital control panel, each machine features a 10-program memory. Additional filler plates are supplied in order that the working height inside the chamber can be adjusted for a variety of sizes of bag.
In 1997 Stuart Welch invented a method of drying wet books and paper document called "Squelch Drying" using a system of vacuum packing. Following rapid support from the British Council the system is being used on a large scale to recover water damaged books and documents from the Prague flood of 2002.