3 edition of Vacuum freeze-drying, a method used to salvage water-damaged archival and library materials found in the catalog.
Vacuum freeze-drying, a method used to salvage water-damaged archival and library materials
John M. McCleary
by General Information Programme and UNISIST, United Nations Educational, Scientific and Cultural Organization in Paris
Written in English
|Statement||prepared by John M. McCleary.|
|LC Classifications||Z701 .M16 1987|
|The Physical Object|
|Pagination||vii, 63 p. :|
|Number of Pages||63|
|LC Control Number||88211905|
Consult a book or paper conservator about the drying of rare or unique materials. Several of the methods described below (dehumidification/desiccant drying, vacuum drying, and vacuum freeze drying) are only available through a commercial disaster recovery firm. Choose a company with experience in drying library or archival collections. This is the newest method to gain credibility in the library and archival world, although it has been used for many years to dry out buildings and the holds of ships. This method is a solution for materials that have suffered extensive water damage. Vacuum Freeze Drying.
Vacuum Freeze-Drying, a Method Used to Salvage Water-Damaged Archival and Library Materials: A RAMP Study with Guidelines. Paris: UNESCO, Miller, R. Bruce. "Libraries and Computers: Disaster Prevention and Recovery." Information Technology and Libraries (December ) Morris, John. The Library Disaster Preparedness Handbook. The company outshines competitors with its unique freeze-drying method customized specifically to document restoration. The TERS staff of seasoned experts is well-trained in the field of book and document recovery, drying, freeze-drying and decontamination.
Vacuum freeze-drying is the only satisfactory method for saturated books and coated papers. The materials that are generally not appropriate for be vacuum freeze drying include: Acrylic and oil paintings on canvas and panel paintings Materials with friable media (pastel, charcoal, some paints). B. Salvage Techniques 'Fumigation'. Conservation of Library Materials: The Newsletter of the Special Interest Group of the Australian Library and Information Association 5 (): 1 - 4. McCleary, John M. Vacuum Freeze-Drying, a Method Used to Salvage Water-Damaged Archival and Library Materials: A RAMP Study with Guidelines. Paris: Unesco,
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Vacuum Freeze-Drying, a Method Used To Salvage Water-Damaged Archival and Library Materials: A RAMP Study with Guidelines.
McCleary, John M. This Records and Archives Management Programme (RAMP) study covers the conservation of archival documents and the application of freeze-drying to the salvage of documents damaged by flood. Salvage of Water Damaged Library Materials - part 8.
VACUUM AND FREEZE DRYING TECHNOLOGIES. It is important to understand that the processes used by vacuum and freeze-drying companies differ considerably depending on the specific requirements of the material to be dried.
The majority of these companies have developed their technologies for food. Water-soaked paper --Stabilization by freezing --Vacuum freeze-drying --Alternate methods of drying --Vacuum freeze-drying --Freeze-drying is not a new process --Early experiments in freeze-drying documents and books --The use of vacuum chambers for recovery of water-damaged archival and library materials --Other vacuum and freeze-drying.
McCLEARY, John M. Vacuum Freeze-Drying: A Method Used to Salvage Water-Damaged Archival and Library Materials: A RAMP Study with Guidelines.
- Paris: UNESCO, Vacuum freeze-drying, a method used to salvage water-damaged archival and library materials: a RAMP study with guidelines By J.M. McCleary and Paris (France). General Information Programme and UNISIST UNESCO.
The successful recovery of water-damaged library and archival materials depends on timely response to a disaster. Rapid response maximizes recovery of collections materials and expedites the restoration of services. To extend decision-making time regarding salvage and replacement, freezing is the most viable option for most institutions.
McCleary, John M. Vacuum freeze-drying, a method used to salvage water-damaged archival and library materials: a RAMP study with guidelines. (Paris: UNESCO, General Information Programme and UNISIST, April ). Freeze drying (vacuum freeze drying) - Frozen records are dried in a vacuum chamber at temperatures below 0° C.
The water passes from ice to vapor without becoming liquid, even though heat may be applied to the shelves to speed up the process. 44 It is important to monitor the temperature of the records inside the chamber; once the materials Cited by: 5.
For the purpose of this study, freeze-drying is defined as a method of drying wetted archival and library materials by freezing, then under vacuum conditions by converting the solid to the vapor phase; the liquid phase is by-passed. When a liquid is converted to the vapor phase by heating, the action is called evaporation.
Vacuum Freeze-Drying. This is best suited for large numbers of wet books and records as well as for materials with water-sensitive inks and coated paper. Boxes of frozen books and records are placed in a vacuum chamber. A vacuum is pulled and a source of heat is introduced while the overall temperature remains below 32° F.
The Library of Congress "Procedures for Salvage of Water Damaged Library Materials" extracts from unpublished revised text, by Peter Waters, July INTRODUCTION Since the first publication in of "Procedures for Salvage of Water-Damaged Materials" there has been no decrease in the frequency of accidents or unexpected disasters which have resulted in extensive water.
preservation: storage: PGI/WS/7: Vacuum freeze-drying, a method used to salvage water damaged archival and library materials: a RAMP study with guidelines: McCleary, John M.
freeze-drying, damage, emergency planning: preservation: restoration: PGI/WS/7. Vacuum thermal drying is a quicker process than freeze drying, but it also may distort some materials.
This less expensive method is best for common papers where the state of the dried product is not as critical. While not a drying method, the process of digitizing documents is useful. Rather than restoration to a physical item, the documents Location: Jetrail Drive, Ooltewah,TN.
The history of freeze-drying is described; six case histories illustrating the use of vacuum chambers for the recovery of water-damaged archival and library materials are presented; and examples. Once frozen, it is best to dry materials by the vacuum freeze-drying method.
During vacuum freeze-drying, water from the damaged material sublimates, i.e., passes from a solid state (frozen) to a gaseous state (vapor), bypassing the liquid stage & therefore minimizing damage from inks and dyes running, boards warping & paper cockling.
Freeze drying/vacuum freeze drying Most efficient method for drying large quantities of material Requires: prior arrangement with vendor, arrangement for transport of collection to vendor, packing/interleaving supplies Cost for service offset by savings in staff time and resources to salvage, less need for follow-up.
The Library of Congress and the National Archives & Records Administration both recommend vacuum freeze drying by sublimation as the preferred method for removing water from paper.
Modern large-scale freeze-drying chambers actually cost less than desiccant or air drying papers Author: Amanda Schooler. A RAMP study with guidelines on vacuum freeze-drying, a method used to salvage water-damaged archival and library materials.
The Australian Institute for the Conservation of Cultural Material (AICCM) Disaster prepardness and risk management contains links to online resources about emergency preparedness for heritage collections, risk management. Freeze drying is a process which can be used to preserve and recover valuable documents damaged by water.
Freeze drying removes water from documents after they have been frozen, allowing them to maintain their biological structure and preventing further deterioration. A universal drying chamber for water-damaged library and archival materials has been constructed – at the National Library of the Czech Republic.
It enables the implementation of three different drying methods: vacuum drying, vacuum freeze drying and drying in a controlled humidity atmosphere. To prevent distortion of books during treatment, they are placed in vertical. Vacuum Freeze Drying Vacuum freeze drying is used to salvage large volumes of paper.
This method of drying uses freezing under vacuum conditions, and conversion of solid, frozen water to vapors while bypassing the liquid phase.Procedures for Salvage of Water-Damaged Library Materials 2nd ed.
Washington: Library of Congress, [Originally published in WAAC Newsletter, boy, Reprinted with the permission of the Western Association for Art Conservation and Betty Walsh.].Removal from Vacuum Chamber and Ready for Cleaning. With vacuum freeze drying technology, it generally takes days to dry wet documents and books, depending on the level of wetness and/or contamination by water, mold, soot and other substances.
This preserves the physical integrity of books and allows them to be straightened successfully.