Reiß Lukas, Prestel Thomas, Giering Sarah
Laboratory of Archaeometry, Dresden University of Fine Arts, Güntzstraße 34, 01307 Dresden, Germany.
Art Technology, Conservation and Restoration of Painting on Mobile Support, Dresden University of Fine Arts, Güntzstraße 34, 01307 Dresden, Germany.
Herit Sci. 2022;10(1):171. doi: 10.1186/s40494-022-00812-4. Epub 2022 Oct 27.
Daylight fluorescent pigments with their intense color effects have attracted great interest among artists since their market launch in the mid-twentieth century. Since then they have been widely used in the visual arts. The pigments are mainly compositions of organic fluorescent dyes and optical brighteners diluted in an insoluble resin. Due to the susceptibility of the dyes to visible and UV radiation, their lightfastness is comparatively low. This paper presents a comprehensive study of the color and fluorescence changes of daylight fluorescent paints upon exposure in visible light and ultraviolet radiation conducted on mock-ups of commercial daylight fluorescent pigments. The different aging characteristics of the pigments depend on the color tone. They were recorded by means of photographic and colorimetric documentation. In addition, Raman spectroscopy was used to identify the main dyes of the various pigments, even in the complex system of paints, consisting of primer, binder, resin and dyes, and to determine their degradation during aging. Fluorescence spectroscopy revealed that the change in fluorescent color may not only be due to the decrease in dye concentration, but also to the transformation of the original dyes into other fluorescent compounds during light aging. Finally, this paper provides recommendations for the presentation of artworks containing daylight fluorescent pigments.
The online version contains supplementary material available at 10.1186/s40494-022-00812-4.
自20世纪中叶上市以来，具有强烈色彩效果的日光荧光颜料引起了艺术家们的极大兴趣。从那时起，它们就被广泛应用于视觉艺术领域。这些颜料主要是有机荧光染料和光学增白剂在不溶性树脂中的组合物。由于染料对可见光和紫外线辐射敏感，它们的耐光性相对较低。本文对商业日光荧光颜料模型在可见光和紫外线辐射下暴露后日光荧光涂料的颜色和荧光变化进行了全面研究。颜料的不同老化特性取决于色调。通过摄影和比色记录对其进行了记录。此外，拉曼光谱法用于识别各种颜料的主要染料，即使是在由底漆、粘合剂、树脂和染料组成的复杂涂料体系中，并确定其在老化过程中的降解情况。荧光光谱显示，荧光颜色的变化不仅可能是由于染料浓度的降低，还可能是由于原始染料在光老化过程中转化为其他荧光化合物。最后，本文为展示含有日光荧光颜料的艺术品提供了建议。
在线版本包含可在10.1186/s40494-022-00812-4获取的补充材料。
