product description: Whiteness≧95% Pure white and bright, environmentally friendly, visually comfortable, and beneficial to health. Opaque ≧85% The paper is uniform and opaque, and can be used on both sides to save resources. Water content 4~7%, low water content, no curling after passing the machine. Neutral paper with pH 7.2±0.2PH, does not corrode office equipment, and is good for long-term storage of documents. Sizing degree ≧ 1mm neutral sizing, which greatly reduces the abrasion of the equipment and prolongs the life of the equipment. Smoothness≧15S The surface of the paper is smooth and delicate, and the machine runs smoothly, which improves office efficiency. Thickness ≧90μm to ensure thickness, good stiffness, no paper jam, no paper.