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Static flatness refers to the long-term stable flat placement performance of paper after cutting and stacking, which is a core indicator affecting high-end printing and finished paper storage quality. Many paper sheets have qualified flatness just after production, but gradually suffer from edge warping, middle bulging and wavy deformation after static placement for 24 to 72 hours. This latent deformation defect is difficult to detect during factory inspection, but will cause automatic feeding jams, inaccurate overprinting and irregular finished products for downstream customers. The fundamental causes include unbalanced residual drying stress, asymmetric transverse and longitudinal fiber shrinkage coefficient, and uneven micro-moisture distribution inside the paper. Traditional flatness adjustment only solves dynamic flatness during production and cannot eliminate latent static stress. With the upgrading of high-precision full-automatic printing equipment, the requirement for paper static flatness is increasingly strict, and latent deformation has become a key pain point restricting high-end paper market expansion.Shandong Ludao Energy Technology Co., Ltd. launches targeted static flatness optimization solutions. By releasing paper internal residual stress in all directions, balancing transverse and longitudinal fiber shrinkage difference, and locking uniform micro-moisture structure, we thoroughly solve the problem of delayed deformation of paper during static storage. The treated paper maintains absolute flat placement state for a long time in normal temperature and humidity environment, has no latent warping and bulging defects, perfectly adapts to high-precision automatic processing, effectively reduces customer after-sales problems, and greatly improves product market reputation and competitiveness.