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Paper mildew is a widespread problem in long-term storage and cross-season transportation. Rich cellulose, residual moisture and organic nutrients on paper surface provide excellent breeding conditions for mold, fungi and microorganisms. In high-temperature and rainy seasons, closed container transportation and damp warehouse storage will accelerate mold reproduction, forming mildew spots, mold filaments and peculiar odor on paper surface. Moldy paper will lose surface flatness, reduce bonding strength, produce harmful odor, and be directly rejected by food packaging, book printing and daily paper customers. Traditional mildewproof agents have short validity period, easy precipitation, and contain heavy metal components, failing to meet food safety and environmental emission standards. Shandong Ludao Energy Technology Co., Ltd. develops long-acting environmentally friendly mildew resistance solutions. By adding food-grade microbial inhibitor components, adjusting paper internal balanced moisture value, and building anti-mold protective film on fiber surface, we inhibit mold spore germination and microbial proliferation fundamentally. The formula is non-toxic, residue-free and compliant with food contact standards, owns 6-12 months lasting anti-mold effect, adapts damp and closed storage environment, reduces mildew scrap loss, and guarantees long-term storage quality of finished paper.