The Development of New Techniques for the Conservation of Books : Evaluating Paper Deterioration and Strengthening Deteriorated Paper

在评价纸张劣化的方法中，滚动试验法是一种无损的方法，它更适合于处于劣化后期的纸张。声发射是一种破坏性有限的方法，是评价纸张劣化的一种非常有用的工具。对于纸质劣化的评价，只需要非常少量的样品，这种方法也是有效的，并且可以用来阐明纤维素的降解过程。对于状况良好的酸性纸张，采用纤维素衍生物进行纸张加固是较为合适的预防措施，而对于劣化程度较高的纸张，采用裂纸是一种治愈性的保存措施。

Among the methods of evaluation of paper deterioration, the Rolling test is non destructive and reveals to be more appropriate for papers in advanced stage of deterioration . The acoustic emission which is a limited destructive method is a very useful tool for evaluation of paper deterioration. The PyGC which necessitates only a very tiny sample is also effective for evaluation of paper deterioration, and may be used to clarify the process of degradation of cellulose. Paper strengthening method using cellulose derivatives is considered to be more suitable as a preventive measure for acidic papers which are still in good condition while the paper-splitting is a curative conservation measure for papers in advanced stage of deterioration.