a method of drying foodstuffs, blood plasma, pharmaceuticals, etc. while retaining their physical structure, the material being frozen and then warmed in a high vacuum so that the ice sublimes, a process in which water is removed from a product after it is frozen and placed under a vacuum, allowing the ice to change directly from solid to vapor without passing through a liquid phase, protsess, mille käigus aurustatakse külmutatud materjalist jää, ilma et vahepeal moodustuks vesi