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Long-term static shrinkage is a hidden quality defect that easily occurs during finished paper storage and transportation. Different from instantaneous humidity shrinkage, static shrinkage refers to the slow and irreversible dimensional shrinkage of paper placed in a constant temperature and humidity environment for a long time. This problem is caused by gradual relaxation of internal fiber stress and slow dehydration of bound water inside the paper. Slight static shrinkage will cause paper size deviation and sheet warping, while serious shrinkage will lead to inconsistent batch specifications, failed customer size inspection and order rejection. For customized fixed-specification printing paper and precision packaging paper, static shrinkage is a key factor affecting long-term quality stability. Most conventional optimization technologies only improve dynamic anti-shrinkage performance during production and cannot lock fiber structure for long-term static placement, resulting in continuous quality deviation after product delivery. Shandong Ludao Energy Technology Co., Ltd. provides professional static shrinkage control solutions. By stabilizing fiber internal stress structure and locking bound water balance, we inhibit slow fiber shrinkage and structural relaxation, fundamentally solve long-term static shrinkage deformation of paper. The solution ensures stable size and flatness of finished paper during long-term storage and transportation, unifies batch delivery specifications, and greatly improves customer product acceptance rate.