AbstractAccelerated ageing is an often-used tool in conservation research, yet difficult to apply to parchment due to the materials inherent heat sensitivity. The complexity of this organic material makes the analysis of its deterioration especially challenging. An attempt to develop a non-heat ageing protocol for parchment is described in this paper. The work was performed within the scope of a MA-thesis at the State Academy of Art and Design Stuttgart. Samples of a modern new limed goat parchment and pieces of reconstituted parchment made from bovine hide powder were subjected to a combination of light ageing and dynamic ageing at moderate temperatures. All samples were analysed with the goal to observe degradation on as many structural levels as possible: colour measurement via VIS spectrometry and light-microscopic observation of fibre damage were employed to assess visible changes. Shrinkage temperature (Ts) was measured as an indicator for the amount of intact intrafibrillar bonds and the determination of the maximum moisture absorption capacity gave an impression on the parchments overall level of hygroscopy. In addition, PMF (Peptid Mass Fingerprinting) via MALDI/MS TOF was performed on extracts from unaged and light aged goat parchment. The results of the different types of analysis showed significant degradation on different structural levels of the parchment, indicating that accelerated ageing of parchment that uses a combination of light and dynamic ageing may be a viable alternative to the more commonly applied thermal ageing.

中文翻译：

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羊皮纸的加速老化：光催化低热方法的研究

摘要加速老化是保护研究中常用的工具，但由于材料固有的热敏感性，难以应用于羊皮纸。这种有机材料的复杂性使得对其劣化的分析尤其具有挑战性。本文描述了为羊皮纸开发一种非热老化协议的尝试。这项工作是在斯图加特国家艺术与设计学院的硕士论文范围内进行的。现代新型石灰羊皮纸样品和由牛皮粉制成的重组羊皮纸碎片在中等温度下进行了光老化和动态老化的组合。分析所有样品的目的是在尽可能多的结构水平上观察降解：通过 VIS 光谱法测量颜色和对纤维损伤进行光学显微镜观察来评估可见变化。测量收缩温度 (Ts) 作为完整原纤维内键的数量的指标，并且最大吸湿能力的测定对羊皮纸的整体吸湿性水平产生了影响。此外，通过 MALDI/MS TOF 对未老化和轻度老化山羊羊皮纸的提取物进行 PMF（肽质量指纹图谱）。不同类型的分析结果表明，羊皮纸的不同结构水平显着退化，表明结合光老化和动态老化的羊皮纸加速老化可能是更常用的热老化的可行替代方案。测量收缩温度 (Ts) 作为完整原纤维内键的数量的指标，并且最大吸湿能力的测定对羊皮纸的整体吸湿性水平产生了影响。此外，通过 MALDI/MS TOF 对未老化和轻度老化山羊羊皮纸的提取物进行 PMF（肽质量指纹图谱）。不同类型的分析结果表明，羊皮纸的不同结构水平显着退化，表明结合光老化和动态老化的羊皮纸加速老化可能是更常用的热老化的可行替代方案。测量收缩温度 (Ts) 作为完整原纤维内键的数量的指标，并且最大吸湿能力的测定对羊皮纸的整体吸湿性水平产生了影响。此外，通过 MALDI/MS TOF 对未老化和轻度老化山羊羊皮纸的提取物进行 PMF（肽质量指纹图谱）。不同类型的分析结果表明，羊皮纸的不同结构水平显着退化，表明结合光老化和动态老化的羊皮纸加速老化可能是更常用的热老化的可行替代方案。