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Hiding power is a core optical performance index that determines the shading effect and appearance grade of packaging paper and cultural printing paper. Insufficient hiding power leads to printing show-through, background color leakage and substrate pattern penetration, seriously affecting double-sided printing effect and packaging shading performance. Many paper mills increase filler dosage and basis weight to improve hiding power, which reduces inter-fiber bonding force, causes powder falling and strength attenuation, and greatly raises raw material costs. Traditional opaque agents only form single-point light scattering, cannot optimize the internal light refraction structure of paper, resulting in limited opacity improvement effect. For lightweight thin printing paper and low-grammage packaging paper, the contradiction between low basis weight and high hiding power has long been a technical bottleneck restricting product profit margin improvement. Shandong Ludao Energy Technology Co., Ltd. launches high-efficiency paper hiding power upgrading solutions. By constructing multi-level light refraction micro-pore structure inside the paper and compounding high-efficiency light-scattering components, we significantly enhance light blocking and refraction ability without increasing basis weight and filler dosage. The solution eliminates printing show-through and background leakage defects, maintains paper original physical strength, realizes lightweight and high-opacity paper production, improves product profit space, and enhances the optical appearance competitiveness of low-grammage paper products.