Vacuum Freeze Drying in Skokie, IL
WHAT IS VACUUM FREEZE DRYING? Freeze drying is a technique by which material is frozen, then, dehydrated by sublimation with complete retention of form. Sublimation is the process by which the contained water passes directly from a frozen to a gaseous avoiding a liquid state completely. In the first step before vacuum freeze drying, the water-damaged articles are quickly frozen. This minimizes the formation of ice which can damage the paper in water-damaged books, documents. Frozen material is placed into a vacuum chamber treatment where the freeze-drying process takes place. The time needed to completely dry materials varies according to the thickness of the material, type of paper and degree of saturation. Vacuum freeze drying in Skokie, IL does not distort, is noninvasive and produces no chemical damage.
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