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档案纸张间的酸迁移,会导致无酸纸酸性逐渐增强,理论与实践早已认识这一现象,但关于酸迁移的机理及其影响因素至今未做研究。本文采用干热老化实验和湿热老化实验,研究酸迁移的一般特征,发现纸张中的酸会随着时间的推进而愈发向另一纸上迁移,迁移受到纸张种类等因素影响;在相同温湿度环境中,手工纸对于H+的吸附能力强于机制纸。在对老化后中性纸红外谱图的对比研究中发现,酸迁移还表现在会直接导致纸张泛黄,这一研究结论进一步证实档案使用无酸纸张、卷皮盒的重要性。
Acid transfer between the paper and the archive will result in the acidity of the acid-free paper gradually increasing. The theory and practice have long recognized this phenomenon. However, the mechanism of acid migration and its influencing factors have not been studied so far. In this paper, dry heat aging test and heat aging test were used to study the general characteristics of acid migration. It was found that the acid in the paper will migrate to another paper with the passage of time and the migration will be affected by the paper type and other factors. Humidity environment, handmade paper for H + adsorption capacity is stronger than the mechanism of paper. After comparing the infrared spectra of aged neutral paper, it is found that the acid migration also leads to yellowing of the paper directly. The conclusion of this study further confirms the importance of using acid-free paper and leather box.