Anoxic (oxygen-free) conditions are used for the storage of fragile organic artefacts, as well as for pest control. Anoxia is also used to store sensitive metals (such as archeological iron) and minerals (pyrites) to prevent corrosion. Hypoxic (reduced oxygen) conditions are used to provide fire-proof storage of archives.

Anoxic environments can be created by a variety of means. The simplest method is created bu using a well-sealed container (usually made of a flexible barrier film), and an appropriate oxygen absorber. Anoxic environments can also be created by displacing the air with a purge of nitrogen or argon gas, sometimes in combination with a vacuum or lesser quantities of oxygen absorbers. Keepsafe is pleased to offer easy to use kits and ready-made enclosures from ZerO2.

Oxygen-free conditions are occasionally used for anoxic museum display, which may be achieved using either active and passive methods. All anoxic display methods require superbly designed and sealed showcases, as well as an investment in monitoring and maintenance. Keepsafe offers direction and equipment for this highly specialized area.

The atmosphere normally contains around 20% oxygen. When oxygen levels are reduced and held at less than 17%, combustion cannot occur. At 17% oxygen levels near normal access to stored collections can be maintained. With suitable machinery and building envelope modifications, hypoxic conditions may be created in an archive as a fire prevention method. We invite your inquiries.