[Mitsubishi Gas Chemical, Japan] A registered trademark for a series of products designed to absorb oxygen from the air. Ageless® was first sold in Japan in 1977. It is composed of fine particles of iron (<50 mesh) mixed with a natural zeolite and a small amount of sulfur and sea salt (potassium chloride). This mixture is sealed in small, polyethylene bags that are permeable to oxygen but not to moisture. The zeolite maintains a constant moisture environment within the bag, and the salt is an electrolyte, thus providing the perfect conditions for the iron powder to oxidize or rust. Ageless® has been used to produce an oxygen-free environment for the killing insects (Grattan and Gilberg, 1994). It is usually placed with, but not touching, an infested object inside a sealed bag made from an oxygen barrier film. The number designation after the Ageless® name indicates the package size, i.e. Ageless® Z-2000 can absorb 2000 ml of oxygen.
Synonyms and Related Terms
Ageless Z; Ageless-Z
Hazards and Safety
The reaction of oxygen with iron is exothermic.
° D.Grattan, M.Gilberg, "Ageless Oxygen Absorber: Chemical and Physical Properties" Studies in Conservation 39:210-214, 1994.
° N.Valentin, F.Preusser, "Insect Control by Inert Gases in Museums, Archives and Libraries" Restaurator 11:22-23, 1990.° Ageless: Website
Sources Checked for Data in Record
- Marie Svoboda, Conservation Survey Index, unpublished, 1997
- Conservation Support Systems, Catalog, 1997