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水分是指纸张中的水分含量的多少,用%表示。各种纸张都有一个最佳水分含量值,在此值下,纸张的各种性能都处于较好状态,铸涂纸、铸涂白纸板最佳水分含量为7%±2%,白卡纸为4%-7%,单面涂布白纸板为8%±2%。纸张的水分含量与温度、湿度相关。
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