Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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A colorless organic liquid (Na . (CH 2 ) 2 . O . (CH 2 ) 2 ), which boils at 128° C., and has a characteristic ammonialike and slightly fishy odor. It has been proposed as a vapor-phase deacidifying agent, mainly because it is inexpensive, easily used, and deacidifies rapidly in suitable chambers. Its main disadvantage, other than its highly disagreeable odor, is the tendency of the treated paper to revert to an acid condition in the presence of high relative humidity.

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