Why do the Guayakí Bio-Bags use aluminum?
Aluminum has been used since Roman and Greek times in various forms, and is used today in a wide variety of packaging materials. This metal acts as a very effective barrier to light, oxygen, odors, flavors, moisture, and bacteria. The new Guayakí bags are designed to provide the freshness benefits of an aluminum barrier, using the absolute minimum amount of metal necessary. The NatureFlex film used by Guayakí is the only metallized biodegradable film suitable for home composting because the level of metal is miniscule, less than 0.02% of the bag by overall composition. The ultra-thin layer is only a few atoms of aluminum thick, as opposed to the much thicker 180 ml sheets that are used by most companies. How is NatureFlex made? Cellulose film is made by digesting wood in a series of chemical processes that remove impurities and break the long fiber chains in the raw material. Regenerated via extrusion of a dissolved cellulose liquid as a clear, shiny film, with plasticizing chemicals a
