I have a small unit that I use a lot at times, used properly you can save food for months without frost damages.
Vacuum packing is a method of
packaging that removes air from the package prior to sealing. This method involves (manually or automatically) placing items in a plastic film package, removing air from inside and sealing the package.
[1] Shrink film is sometimes used to have a tight fit to the contents. The intent of vacuum packing is usually to remove oxygen from the container to extend the
shelf life of foods and, with flexible package forms, to reduce the volume of the contents and package.
[2]
Vacuum packing reduces atmospheric oxygen, limiting the growth of
aerobic bacteria or
fungi, and preventing the
evaporation of
volatile components. It is also commonly used to store dry foods over a long period of time, such as
cereals,
nuts, cured
meats,
cheese, smoked
fish,
coffee, and potato chips (
crisps). On a more short term basis, vacuum packing can also be used to store fresh foods, such as vegetables, meats, and liquids, because it inhibits bacterial growth.
Vacuum packing greatly reduces the bulk of non-food items. For example, clothing and bedding can be stored in bags evacuated with a domestic
vacuum cleaner or a dedicated vacuum sealer. This technique is sometimes used to compact
household waste, for example where a charge is made for each full bag collected.
Vacuum packaging products, using
plastic bags,
canisters,
bottles, or
mason jars, are available for home use.
For delicate food items which might be crushed by the vacuum packing process (such as potato chips), an alternative is to replace the interior gas with nitrogen. This has the same effect of inhibiting deterioration due to the removal of oxygen.
