These rare volumes are preserved in the National Central Library in iron, fireproof safes, which contain camphor to drive off worms and other pests, and are also lightproof to protect the paper from the sun's damaging rays.
受損的跡像是褪色、變黑，書面和書頁間容易脫落。目前中央圖書館善本書庫備有安全鐵箱存放古書，可以避免這些光線的損害。空氣中的微粒物，如沙塵、黴菌等都會侵蝕皮質和紙質的書面。