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Deacidification is a crucial chemical treatment process used in the preservation of library materials, especially paper-based documents. Over time, paper made from wood pulp becomes acidic due to the presence of lignin and alum-rosin sizing used in the manufacturing process. This acid content leads to the gradual deterioration of paper, causing it to become brittle, discolored, and eventually _____ __________ ________ ___ _____ __________ ______ ____ __________ _________.
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