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Surface crystallization is a subtle but troublesome surface defect of coated paper and high-grade sizing paper. After sizing and coating treatment, residual auxiliary agents on the paper surface will slowly precipitate and form tiny crystalline particles under temperature and humidity alternation and long-term storage. Surface crystallization leads to uneven paper gloss, granular rough hand feel, and tiny protruding particles on the surface. In high-precision printing, crystalline particles will scratch printing plates, cause ink missing and dot distortion, seriously affecting printing fineness. Most crystallization defects do not appear when leaving the factory but gradually precipitate after customer storage, easily causing after-sales quality disputes. Traditional surface sealing treatment can only cover particles temporarily and cannot inhibit internal agent precipitation and crystallization reaction. Shandong Ludao Energy Technology Co., Ltd. launches paper anti-crystallization optimization solutions. By stabilizing surface auxiliary agent molecular structure and inhibiting precipitation and crystallization reaction, we eliminate delayed crystalline particle generation. The solution maintains long-term surface smoothness and gloss uniformity of coated and sized paper, avoids printing defects caused by crystallization, and improves finished product after-sales stability.