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Environmental control plays a critical role in preserving and conserving library materials by mitigating the various factors that contribute to their deterioration. Library materials such as paper, leather, parchment, adhesives, and photographic items are highly sensitive to changes in their surrounding environment. By controlling temperature, humidity, light exposure, air quality, and biological threats, libraries can significantly slow down the degradation process and extend the life of these materials. Temperature and humidity are among the most significant environmental factors affecting library materials. High temperatures accelerate chemical reactions, including acid hydrolysis and oxidation, which cause paper to become brittle and discolored. Conversely, low temperatures can reduce these chemical reactions but may not be suitable for all types of materials. Similarly, fluctuations in relative ____ ______ _________ _________ ________ ________ ____ ______ ______ _________ _____.
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