Dielectric drying books with

Some of the problems that arose while operating the dielectric and microwave equipment are listed in Table II. Books with leather covers, bindings applied with some synthetic adhesives, or excessive amounts of frozen mud on the spine or back edge could not be dried by either the... 

Subsequent to freeze stabilization, wet books can be thawed and air dried with or without interleaving or they can be vacuum dried in heated chambers (5). The moisture in frozen books can be sublimed by freeze drying (10) or removed by a vacuum/thaw/outgassing process (8), with microwave energy (6, 14), with dielectric energy (6), or by solvent extraction with or without vacuum assistance (5). 

The successful application of either microwave or dielectric energy for drying requires that water, as it is evaporated, be removed from the paper and book. Air with low relative humidity is forced through the chamber to facilitate water vapor removal from the object. Since interaction of the water molecules at different locations in the chamber may not be uniform, each frozen flood-damaged item was inverted and partially rotated between each burst of energy. Radiation leakage from both types of equipment is possible therefore, special precautions for com-... 

These preliminary tests indicated an erratic response by the frozen book to the radiation. Equivalent drying did not occur with similar damaged materials. Whether the irregularities were caused by the material or the equipments performance was not evident. After the initial experiments with both dielectric and microwave heaters, the dielectric apparatus was chosen for additional experiments. This decision was based primarily upon this equipment s having the higher power capability. 

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