摘要
为了探究文物加固剂Paraloid B72(简称PB72)施加后产生表面增深效果的原因,文章采用显微红外光谱仪和分光光度仪测量了PB72的红外吸收光谱及该材料施加前后样块表面的色度、反射率曲线等参数。通过对相关参数的分析,发现PB72分子中存在不饱和键,该材料的施加会使样品表面总体反射率降低,同时还会使L^(*)值降低,b^(*)值升高,得出了表面增深效果是因PB72的低折射率降低文物表面的反射率,其泛黄是在低波长区间加剧了反射率的降低,同时老化导致的变黄会进一步加深效果的结论,并将该材料应用于一件唐代墨书墓志的加固中,发挥增深效果的正效应,实现了字迹的加固与显现。
To investigate the deepening effect of Paraloid B72,the infrared absorption spectrum of PB72 and the chrominance and reflectivity curve of the sample surface before and after the material were measured by micro infrared spectrometer and spectrophotometer.By the analysis of the related parameters,it was found that there is an unsaturated bond in the PB72 molecule.The application of the material would lead to a decrease in the reflectivity of the sample surface,as well as the decrease of L^(*)value and the increase of b^(*)value.It was concluded that the surface deepening effect was due to the reduction of the cultural relic surface reflectance,and the yellowing of PB72 aggravates this reduction,and the aging will strengthen the deepening effect.This material was applied to the reinforcement of a Tang dynasty epitaph,and the positive effect of deepening was brought into play,and the handwriting reinforcement and visibleness were realized.
作者
杨璐
张杰妮
黄建华
Yang Lu;Zhang Jieni;Huang Jianhua(School of Cultural Hertitage,Northwest University;Eperor Qinshihuang's Mauso Leum Site Park)
基金
国家重点研发计划项目(项目编号:2019YFC1520700)
陕西省重点研发计划项目(项目编号:2019ZDLSF07-05)的资助
关键词
文物加固剂
Paraloid
B72
表面增深
原因分析
文物保护应用
Cultural Heritage Consolidation A gent
Paraloid B72
Surface Deepening
Reason Analysis
Conservation Application
