纸张是档案等信息资源的重要载体。处于开发和存贮信息资源的需要，人们总是希望那些存有信息的纸张能长期或永久保存下去。但随着时间的推移，纸张由于内外部因素的作用会逐渐发黄变脆，甚至成为不堪入目的碎片，严重制约着档案等信息材料的长久保存和使用。纸张的这种发黄变 Paper is an important carrier of information resources such as archives. In the need to develop and store information resources, people always hope that the paper with information can be saved long-term or permanent. However, with the passage of time, the paper will become yellowish and brittle due to the internal and external factors, and even become unprofitable fragments, seriously restricting the long-term preservation and use of archives and other information materials. This yellowing of the paper