Sealed placement can solve this problem well, such as in a sealed bag.
Some precious books should be read less. If possible, they can be placed in a well-sealed box, which is filled with desiccant and injected with high-purity nitrogen to prevent oxidation. When books are in the natural environment, the paper will be damaged by oxygen and harmful gases in the air, and oxidation, acidification and hydrolysis reactions will occur, which will make the paper yellow and brittle. Nitrogen protection can prevent these reactions.
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