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，滚动试验具有非破坏性，更适用于纸张劣化后期。声发射作为一种有限破坏方法，是评价纸张劣化的一种非常有用的工具。PyGC只需要非常小的样品，也可以有效地评估纸张的劣化，并可用于澄清纤维素的降解过程。纤维素衍生物的纸张强化法更适合于酸性纸张的预防措施，而碎纸法则是一种治疗性的保护措施，适用于变质较严重的纸张。

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.