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通过模拟博物馆馆藏环境搭建了颜料光致变色研究的实验装置,采用漫反射紫外可见光谱技术对古书画、壁画等常用的朱砂、朱磦、胭脂、三绿、三青颜料在365nm紫外光照射下的变色规律进行了考察,并利用主成分分析对光谱数据进行分析,进一步对其变色规律进行研究。结果显示,朱砂、朱磦、胭脂三种颜料的光谱呈“S”型,它们对365nm紫外光的稳定性依次为朱磦、朱砂、胭脂;三绿和三青的光谱呈“钟”型,三绿的稳定性好于三青。所建立的漫反射紫外可见光谱方法为颜料光致褪色的规律及机理研究提供了新的无损分析手段。
By simulating the collection environment of the museum, an experimental device for photochromic study of pigment was built. The common cinnabar, cinnabar, rouge, three-green and three-cyan pigments of ancient paintings and murals were diffused by UV-visible light The discoloration regularity was investigated, and the principal component analysis was used to analyze the spectral data to further study its discoloration law. The results showed that the spectra of three kinds of pigments such as cinnabar, cinnabar and rouge showed “S” shape. Their stability to 365 nm ultraviolet light was followed by cinnabar, cinnabar and rouge. The spectra of three green and three green "Type, the stability of three green better than three green. The established method of diffuse reflectance UV-visible spectroscopy provides a new non-destructive analysis method for studying the law and mechanism of photochromic pigment fading.