2021年8月19日 — First off, it takes about 24 to 36 hours to freeze dry food with a home-built freeze dryer using a vacuum pump (that method's discussed next).
Thoroughly wash and prepare the fruits, vegetables or herbs you wish to freeze dry. Remove any damaged or bruised portions and slice them into uniform pieces.
Freeze-drying dehydrates food by freezing it and then vaporizing the ice crystals. · Freeze-drying is different from other dehydration techniques, such as vacuum...
Foods that can be freeze-dried · Fruits: strawberries, apples, blackberries, bananas, pears, oranges, and fruit puree · Vegetables: almost all vegetables, such as...
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