【摘要】 在评价脱酸效果的时候,纸张的耐久性是重要的性能之一。因此,评估脱酸后不同年代纸张的老化速度,对以后判断书籍是否需要脱酸处理提供依据。对比1946年、1963年、2005年三种凸版纸脱酸前后加速老化的过程,研究其p H值、聚合度随老化时间的变化情况。实验结果表明,年代越久远的纸张,脱酸效果越好,耐久性的提高越明显,从而说明对于酸化程度较低的书籍或档案,不建议进行脱酸处理,而且保存中应注意环境湿度的恒定。更多还原

【Abstract】 After thermal aging,the p H values and degree of polymerization( DP) of untreated and treated typographic papers dated to 1946,1963 and 2005 were determined. Results indicate that the p H values and DP of treated paper from 1946 is the lowest,and that de-acidification improves its durability. It is not recommended that paper of low acidity( high p H) be subjected to de-acidification. Rather it should be conserved under a constantly stable environmental condition.更多还原