Freeze-drying is a technique of drying by using the principle of sublimation. It is a process of rapidly freezing the dried substance at low temperature and then directly sublimating the frozen water molecules into water vapor escape under proper vacuum environment. Freeze-drying is the Product of called freeze-drying (lyophilizer), the process is called freeze-drying (lyophilization).
The substance is always in the low temperature (frozen state) before drying, and ice crystals are evenly distributed in the substance, so the sublimation process will not be concentrated due to dehydration, avoiding the side effects such as foaming and oxidation caused by water vapor Dry matter is a dry sponge porous, the volume is basically unchanged, easily dissolved in water and restored. Prevent the chemical, physical and biological degeneration of dry matter to the greatest extent.
