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During production, use and storage, paper develops acidic compounds that degrade cellulose fibers, causing brittleness, yellowing and deterioration. Deacidification protection neutralizes these acids and establishes an alkaline buffer reserve within the paper, slowing further aging and extending document life.

No. The safety of original documents is the absolute foundation of every ZHONGCAI technical solution. We use green water-based calcium reagents that contain no organic solvents and do not affect document color, text or binding structure. All equipment has been validated through extensive testing to ensure a safe, non-damaging process.

ZHONGCAI's deacidification technology is suitable for a wide range of paper materials including archival records, ancient manuscripts and rare books, modern monographs, calligraphy and paintings, rubbings, sutras, certificates and legal documents. Contact us for a professional assessment of specialized or unusual document types.

pH testing is the standard method for evaluating acidification. Documents with a pH below 6.5 are generally considered to require deacidification. ZHONGCAI offers a non-destructive pH testing service to help you quickly assess the acidification status of your collection and provide data-driven guidance for preservation decisions.

After professional deacidification treatment, the alkaline buffer reserve formed within the paper can continue protecting against re-acidification for decades. The actual duration varies depending on the original condition of the documents and the storage environment. Periodic pH monitoring is recommended, with re-treatment scheduled as conditions require.