Product Overview Vacuum freeze-drying is one of the most gentle methods of drying. It is based on the sublimation principle — the physical phenomenon in which a solid phase transitions directly into a gas phase. The material to be freeze-dried is placed in a vacuum drying chamber, and the water vapor produced is condensed by the cold trap to form ice, thereby eliminating water vapor. A vacuum pump is used to discharge the air in the drying chamber, excluding water vapor. The
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