How freeze-drying works
Frozen water is removed mainly through sublimation under reduced pressure, followed by controlled removal of remaining bound moisture.
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Discuss your projectFrozen water is removed mainly through sublimation under reduced pressure, followed by controlled removal of remaining bound moisture.
Hot-air drying evaporates water from unfrozen food, usually with different heat and mass transfer behavior.
Color, aroma, texture, nutrients, energy demand and stability depend on raw material and process settings; fixed percentage-retention claims are not scientifically universal.
Choose based on desired texture, application, economics, packaging and validated shelf life.