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Mold prevention is a conservation activity that is performed in libraries to protects books and other materials from deterioration caused by mold growth. Mold prevention consists of different methods, such as chemical treatments, careful environmental control, and manual cleaning. Preservationists use one or a combination of these methods to combat mold spores in library collections. Due to its resilient nature, mold prevention has become an important activity among preservation librarians. Mold reproduces by releasing spores into the air. It becomes active after being in a dormant state and responds to fluctuating temperature, air flow, and humidity within the surrounding environment. Library holdings have been deemed vulnerable since mold digests paper and other organic materials that collection items consist of. Moisture in the atmosphere contributes to irreparable damage caused by mold growth.〔Baker, Whitney. "Preservation Perspectives: Mold in the Stacks: A Universal Problem. ''Kentucky Libraries.'' 65(3)(Summer 2001):20-22.〕 ==Chemical treatment== Preservation librarians use a number of different chemicals to prevent the growth of mold spores. Chemical compounds such as ethylene oxide, thymol, and orthophenyl phenol are regularly used.〔Southwell, Kristina L. "The Use of Chlorine Dioxide as a Mold Treatment and its Effect on Paper Acidity: a case study." ''The Journal of Academic Librarianship.'' 28(6) (2002): 400-405.〕 Chlorine dioxide is a chemical that is growing in popularity due its safety level for library employees and patrons. These chemicals act as effective sporicides in a variety of library settings. They are applied on books and surrounding shelves by manual wiping or using chlorine packets that release the chemicals in gaseous form into the air.〔Southwell, Kristina L. "Chlorine Dioxide: a treatment for mold in libraries." ''Archival Products.'' 10(3) (2003)〕 Chemical treatments are often used in enclosed storage areas with little air circulation. They are also used to deal with emergency situations involving mold outbreaks caused by pipe leaks in buildings. In 2000, the University of Oklahoma Libraries conducted an evaluation of the effects of chlorine packets on mold growth. Paper items that had been exposed to the substance showed lower overall pH levels than items that had not been treated. Although long-term effects of chemical treatments on paper permanence and other library materials have not been documented, libraries use this newer method of controlling mold in the stacks.〔Southwell, Kristina L. "The Use of Chlorine Dioxide as a Mold Treatment and Its Effect on Paper Acidity: a case study." ''The Journal of Academic Librariansip.'' 28(6) (2002): 400-405.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Mold prevention」の詳細全文を読む スポンサード リンク
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