Studies in Conservation ( IF 0.8 ) Pub Date : 2021-01-17 , DOI: 10.1080/00393630.2020.1846931 Kang Lee 1 , Toshiharu Enomae 1 , Masamitsu Inaba 2
ABSTRACT
One of the factors affecting the life expectancy of hanging scrolls is the storage environment. Our study focused on clarifying the degradation behaviour of painting paper, concentrating on the specific storage conditions that provide an airtight environment in a storage box and the stacked structure of the rolled paper rather than considering the materials of the wooden storage box or the gases generated from it. The degradation behaviour and rates for the sealed tube and moist heat ageing methods, excluding the additional effects of light and air pollutants, were compared. When the painting paper was immersed in a CuSO4・5H2O solution instead of a copper green pigment, the oxidation of the painting paper, attributed to Cu2+, proceeded faster with the sealed tube method than with the moist heat method. The co-occurring organic acids generated, namely glycolic and formic acids, which were secondary components, were detected in a higher amount in the first lining paper than the painting paper. This implies that the acids migrated from the painting paper into the lining paper. However, oxalic acid, which was the main component, did not significantly migrate and remained in the reaction system in the sealed tube without volatilising. This increased the hydrogen ion concentration in the painting paper and accelerated acid hydrolysis. Consequently, discolouration and a decrease in the degree of polymerisation and physical strength proceeded faster with the sealed tube method than with the moist heat method. Thus, although this result does not necessarily invalidate the storage system of a rolled hanging scroll in a box, the storage of a deteriorated hanging scroll in a closed system is expected to degrade the painting paper faster than it would in an open system.
中文翻译:
湿热和密封管老化方法的日本卷轴中的绘画纸的降解行为比较
摘要
影响挂轴寿命的因素之一是存放环境。我们的研究侧重于阐明油漆纸的降解行为,集中于在存储箱中提供密封环境的特定存储条件和卷筒纸的堆叠结构,而不是考虑木制存储箱的材料或产生的气体。它。比较了密封管和湿热老化方法的降解行为和速率,不包括光和空气污染物的附加影响。将画纸浸入CuSO 4 ·5H 2 O 溶液而不是铜绿颜料时,画纸的氧化归因于Cu 2+, 密封管法比湿热法进行得更快。在第一衬纸中检测到的同时生成的有机酸,即作为次要组分的乙醇酸和甲酸的含量高于油漆纸。这意味着酸从油漆纸迁移到衬纸中。然而,作为主要成分的草酸没有显着迁移,而是保留在密封管中的反应体系中而没有挥发。这增加了画纸中的氢离子浓度并加速了酸水解。因此,与湿热法相比,密封管法的变色和聚合度和物理强度的降低进行得更快。因此,