What exactly is freeze dried food? How does it become freeze dried? Freeze dried food is food that has gone through the lyophilization process. Basically, this process removes all the water from frozen food via sublimation. Sublimation is a type of state-change, where a substance goes from a solid directly to a gas without passing through the liquid state. In this case, the ice never "melts" into liquid water, it passes directly into gaseous form in a vacuum. The result is food that is hardly shrunken and can be preserved for much longer than other foods. This is great for emergency food storage scenarios.
Where did it start? How did this become an everyday process? Though the commercial process of industrial water chiller manufacturers freeze drying is new, the idea is old. The Incas, among other ancient people, used a natural method of freeze drying to preserve foods. Commercial freeze drying began during World War II to preserve blood plasma and penicillin. Today, more than 400 different types of food can be freeze dried. Foods with high water content do not freeze dry well. For instance, watermelon is a poor choice for freeze drying. Coffee, on the other hand, is great for freeze drying; many people use powdered coffee every day.
What are the stages of freeze drying the food for storage? Is it hard? The first stage of freeze drying is to freeze the food. It must be rapidly frozen in a very cold environment. After freezing, the food is placed in a vacuum, which vaporizes the frozen water contained within the food. This stage can be accelerated by applying a small amount of heat to the system. After the water is removed, the food is sealed in moisture-proof packaging with some type of chemical that absorbs oxygen. This allows the food to be stored in normal conditions. When you want to eat the preserved food, all you must do is open the package and soak in water for fifteen to twenty minutes. After the package is unsealed, the food will last a further nine to twelve months without spoiling if it is kept in a cold place with the oxygen-absorption packet on top of it. Every food storage brand is different so make sure you get the right one for your needs.
There are many things to learn about food storage and how the process is created. This is a simple breakdown of how freeze dried food and food storage work. It is always important to have an emergency medical and food kit ready in the event of a disaster or emergency.
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