Freeze-drying works by freezing the material and then reducing the pressure to allow the frozen water in the product to sublimate directly from the solid phase to the gas phase.
Xayiraadda-qalajinta shuqullada by  baraf  wax ka dibna la yareeyo ku xeeran  cadaadis  in ay oggolaadaan in biyaha la qaboojiyey in wax ka si  sublimate  si toos ah uga marxaladda adag in ay wajiga gaaska.