Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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A growth caused by micro-organisms, whose spores, in a moist, warm environment, become molds. They derive their food from the substance on which they form, e.g., the materials of a book. During their growth they produce citric, gluconic, oxalic, or other organic acids, that can damage paper, leather, cloth, etc. They also at times produce color bodies, leading to staining which is difficult to remove.

In counteracting mildew, every part of the affected book must be treated with the inhibitor most suited for it. The best preventatives, however, are thorough cleanliness, sunlight, dry circulating air, and relatively low temperature. See also: FUNGI ; MOLD (4) . (144 , 363 )

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