Study on the Effect of Environmental Change on the Golden Hall of Chusonji Temple

环境变化对中尊寺金殿的影响研究

• 批准号: 07831012
• 负责人: MIURA Sadatoshi
• 金额: $ 1.28万
• 依托单位: Tokyo National Research Institute of Cultural Properties
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07831012/
• 关键词: the Golden Hall of Chusonji Temple; shrinkage of wood; urushi (Japanese Jacquer); temperature; humidity; conservation; 温湿度変化; 木材; 寸法変化

Golden Hall (Konjiki-do) of Chusonji Temple is stored now within a large glass showcase. The showcase was improved in 1990 because an old one was not enough sealed from outside. The average humidity inside changed from 80% to 65% due to the improvement, which caused shrinkage of wood and cracks of urushi (Japanese lacquer) layr of the surface. The study was intended to know whether the shrinkage continues or not. If not, they can think about the restoration.Following measurements were done : temperature and humidity within the showcase, width of a gap between two timbers and strain of a urushi layr. The humidity inside is almost stable at 65% while the temperature changes from 5ﾟC to 25ﾟC according to seasons. The width of a gap between two timbers also changes about 0.4mm according to seasons. It became slightly larger in 1995 but was almost stable from 1996 to 1997 in average. The strain of an urushi layr, however, still increases with some seasonal changes.These results tell us that the shrinkage of wood probably ceased after ten years of the improvement but the strain of an urushi layr still remains, which would cause a further crack. The reason why the strain remains may be because a shrank timber gives a stress to its surface urushi layr.

中尊寺的金殿（Konjiki-do）现在存放在一个大型玻璃橱窗内。陈列柜在1990年进行了改进，因为一个旧的从外面密封不够。室内平均湿度由原来的80%下降到65%，导致木材收缩，表面漆层开裂。这项研究的目的是了解这种萎缩是否会继续下去。如果没有，他们可以考虑恢复。以下测量完成：温度和湿度的陈列柜，宽度的差距两个木材和应变的漆层。室内湿度几乎稳定在65%，而温度根据季节从5摄氏度到25摄氏度变化。两个木材之间的间隙的宽度也根据季节变化约0.4mm。1995年略有增加，但1996年至1997年平均几乎保持稳定。漆层的应变随季节的变化而增加，说明木材的收缩在10年后可能已经停止，但漆层的应变仍然存在，这将导致进一步的开裂。应变仍然存在的原因可能是因为收缩的木材给它的表面漆层一个应力。

项目成果

三浦 定俊: "金色堂を守る科学" 週刊朝日百科「日本の国宝」. 98号(印刷中). (1998)

三浦定敏：《保护金殿的科学》《朝日百科全书》《日本国宝》第98期（正在印刷）。

三浦定俊: "史跡薬師堂石仏の保存" 保存科学. 37(印刷中). (1998)

三浦定俊：“历史悠久的药师堂石佛的保护”保护科学 37（出版中）。

S.Miura: "Science for the conservation of the Golden Hall of Chusonji Temple" Asahi Encyclopedia of Treasures in Japan. No.98 (in publishing). (1998)

S.Miura：《中尊寺金殿的保护科学》日本朝日宝物百科全书。