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When freezing food, we mainly think about keeping the food very cold so that bacteria and fungus does not eat away on the food.

Most bacteria almost stop multiplying already at -5 degrees Celsius.

What most people does not think about is the air around us. It brings another aspect to food keeping. Oxidation. The components of the frozen food actually react with the air (mainly oxygen). The colder the food is kept, the slower this reaction works.

Most today's freezers keep food at -18 Degrees Celsius (approx 0 F). When using airtight containers or wrappings around the food, then this is very good for even long term keeping of food. (1 year should be no problem in most cases).

Most food does not keep noticeably better at lower temperatures. The most important is to use airtight containers and bags so that your food does not react with oxygen present.

A trick worth gold on fish is to freeze it solid, then spray it gently with water all over so that it get "glazed" with a layer of ice all over. Put back into freezer in a plastic bag or whatever useful. It will keep a lot better that way.

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Solon Zboncak

Lvl 13
3y ago

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