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The primary differences relate to campers' and backpackers' special needs for foods that have appropriate cooking time, perishability, weight, and nutritional content. To address these needs, camping food is often made up of freeze-dried, dehydrated, pre-cooked, pre-prepared, or otherwise preserved foods that can last extended periods.
Freeze-dried ice cream. Freeze-dried foods became a major component of astronaut and military rations. What began for astronaut crews as tubed meals and freeze-dried snacks that were difficult to rehydrate, [13] were transformed into hot meals in space by improving the process of rehydrating freeze-dried meals with water. [13]
The food is first prepared, either raw or cooked, and then sealed into the retort pouch. The pouch is then heated to 240-250 °F (116-121 °C) for several minutes under high pressure inside a retort or autoclave machine. The food inside is cooked in a similar way to pressure cooking.
LRP ration, menu 6. Clockwise from top left: beverage base, spaghetti, accessory packet, cornflake bar, tootsie rolls, oatmeal cookie. The Food Packet, Long Range Patrol (LRP; pronounced "lurp") was a freeze-dried dehydrated United States military ration used by the Department of Defense.
Commercial heat sources for self-heating food packaging use an exothermic (heat releasing) reaction, for which there are several common formulations. These include: Quicklime aka calcium oxide, and water. Quicklime, inexpensive and readily available, is generally recognized by the FDA as safe. [2] The product of the reaction is calcium hydroxide.
A freeze-dried Ice cream sandwich in a bag. Freeze-dried Neapolitan ice cream, shown with air-tight foil partially unwrapped. Freeze-dried ice cream, also called astronaut ice cream or space ice cream, is ice cream that has had most of the water removed from it by a freeze-drying process. Compared to regular ice cream, it can be kept at room ...
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