| Abstract: | Summaries. Quite a few mass deacidification methods have been developed in various countries to stop and prevent the deterioration of acid-containing papers in libraries and archives. These methods, which work either with gaseous or with liquid substances, serve to neutralize the acids in the papers. All of them are still in the experimental phase, various parameters remaining to be optimised. Due to the complex technical equipment and safety precautions needed, the gas-based DEZ method can only be implemented in a large-scale facility. The simpler methods that work with liquid substances can be used at reasonable cost even in lower capacity units. Taking the known MMC method as a basis, Battelle developed for the Deutsche Bibliothek an improved mass deacidification plant. The pilot plant combines in it environmental compatibility, ease of operation and short treatment times. The project, in which the Deutsche Bibliothek and Battelle cooperate, is to result in a mass deacidification method which works with liquid methyl magnesium carbonate (MMC) and which is readily useful for libraries and archives all over Germany. |
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