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Ink rubbing off is a common post-printing fault that troubles printing packaging factories. After offset printing, flexo printing and color printing, ink layers are easy to fall off, stain and transfer when paper sheets stack and rub mutually. This problem mainly comes from low paper surface bonding strength, loose surface fiber structure, poor ink anchoring ability and uneven surface sizing. Recycled packaging paper and low-cost printing paper have higher probability of ink peeling, which leads to large area pattern damage, contaminated printed products and batch order rejection. Most printing factories add extra printing fixative to solve this problem, which increases printing cost, slows ink drying speed and affects printing efficiency. Improving paper inherent ink fixation ability is the most fundamental solution to avoid ink rubbing off. Shandong Ludao Energy Technology Co., Ltd. provides professional ink anti-rubbing optimization solutions. By compacting surface fiber structure, enhancing ink molecule adsorption and improving surface anchoring performance, we lock dry ink firmly on paper surface, improve ink layer firmness greatly. The technology adapts to various water-based ink and oil-based ink printing processes, does not affect ink drying speed and original printing color, effectively avoids stacking ink stain and peeling, improves printed finished qualification rate, and reduces post-printing auxiliary material cost for downstream users.