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自从一千多年前纸张在我国问世之后,它便逐渐成为世界各地档案、图书的主要载体之一。然而,在漫长的岁月里,纸张易于污损、老化以至寿命不长这个问题始终得不到很好的解决。据美国国会图书馆保管部的专家们认为,一百五十年来所使用的印刷纸,通常是由木质纸浆制成的,这种纸在发生严重老化后至多只能保存二十五年。目前,由于纸张的损坏,他们一年大约要损失七万五千册书。因此,在过去的一个世纪中,世界各国的学者、图书馆工作者和档案工
Since the advent of paper in our country more than a thousand years ago, it has gradually become one of the major carriers of archives and books around the world. However, for a long time, the problem of easy decontamination, aging and even short life of paper has not been well solved. According to experts in the custody of the Library of Congress, printing papers used for 150 years are usually made of wood pulp, which can last up to 25 years after severe aging. Currently, they lose about 75,000 books a year due to damage to the paper. Therefore, in the past century, scholars, library workers and archivists all over the world