Discuss the basic considerations regarding the physical environment in the preservation of non-book material.

Preserving and conserving non-book materials in a library involves a multifaceted approach that extends beyond traditional printed materials. These materials, which may include photographs, maps, audiovisual recordings, manuscripts, and various artifacts, require special care due to their diverse formats and susceptibility to different forms of deterioration. The physical environment plays a crucial role in the preservation of these materials, and several key considerations must be taken into account to ensure their longevity.

1. Temperature and Humidity Control:
Maintaining a stable temperature and humidity level is paramount in the preservation of non-book materials. Fluctuations in these environmental factors can accelerate the degradation of materials. Ideally, a temperature between 60-70°F (15-21°C) and a relative humidity of 30-50% should be maintained. Extremes in temperature and humidity can lead to physical and chemical deterioration, _____ ________ __________ ______ _____ __________.
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