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Step-by-Step Tutorial
PRACTICAL WALKTHROUGH · PARAMETERS · COMMON MISTAKES
Freeze-drying removes water from food by sublimation, preserving structure and flavor.
Origin: Pharmaceutical industry (1930s) — United States
See full technique reference →The process involves freezing the product to form ice crystals, then lowering pressure to allow the ice to sublimate directly into vapor. During secondary drying, bound water is desorbed at slightly higher temperatures, all while maintaining the integrity of macromolecules and volatile flavor compounds.
Primary Reaction
Solid‑to‑vapor sublimation of H₂O
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