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Anti-tarnish performance is a professional functional indicator dedicated to metal contact packaging paper and hardware interleaving paper. When ordinary paper is in close contact with metal surfaces such as iron, copper, aluminum and alloy parts for a long time, acidic ions, moisture and volatile organic components in the paper will trigger electrochemical reactions on the metal surface. This causes invisible surface discoloration, oxidation tarnish and light corrosion on metal workpieces, which is different from severe rusting and is difficult to detect during factory inspection. Precision hardware, electronic metal terminals and jewelry accessories are extremely sensitive to paper-induced tarnish; slight surface discoloration will lead to product downgrade and order rejection. Conventional neutralized paper only reduces pH value slightly and cannot block active corrosive ions and volatile substances, so the anti-tarnish effect is short-lived and ineffective for long-term sealed storage. Shandong Ludao Energy Technology Co., Ltd. develops dedicated paper anti-tarnish modification solutions. By removing active acidic ions in pulp, decomposing volatile corrosive organic matter and building an ion isolation layer, we cut off the electrochemical reaction path between paper and metal. The treated paper will not cause metal discoloration and tarnish after long-term close contact, complies with precision hardware packaging standards, and provides long-term safe anti-tarnish protection for metal products during storage and transportation.