the most widely used in food manufac-ture had always been considered as one of the best dryingmethod thanks to the excellent quality from its product. Dur-ing freeze drying, the water or other solvent is removed asvapour by sublimation from the frozen material in a vacuumchamber. The freeze drying method had been intensively usedin biological materials, pharmaceuticals, and food productsdue to its advantage that drying without experiencing hightemperature. One of the prominent advantages is the struc-tural rigidity afforded by the frozen substance at the surfacewhere sublimation occurs. This rigidity, to a large extent, pre-vents collapse of the solid matrix remaining after drying.