作为档案用纸，能长久保存是最重要的要求之 一。中国古代的纸张、书画能保存几百年甚至千年，仍有较好的强度及韧性。而现代生产的纸张，只有短短的几十年，纸就会发脆、泛黄、易碎裂。其中的原因在哪里？纸张中的酸度是影响纸张保存的最主要原因。古代的纸张是中性的。而现在 As a file of paper, long-term preservation is one of the most important requirements. Ancient Chinese paper, calligraphy and painting can be preserved for hundreds or even thousands of years, there is still a good strength and toughness. The modern production of paper, only a few short decades, the paper will be crisp, yellow, fragile. Where is the reason? The acidity of the paper is the most important factor that affects the preservation of the paper. Ancient paper is neutral. And now