Birelo Letícia Martins, Appoloni Carlos Roberto
Applied Nuclear Physics Laboratory, State University of Londrina (UEL), P. O. Box 10.011, 86057-970, Londrina, PR, Brazil.
Appl Radiat Isot. 2024 Jul;209:111324. doi: 10.1016/j.apradiso.2024.111324. Epub 2024 Apr 16.
Three paintings of Thomas Gainsborough (1727-1788), one of the most influential English portrait painters of the late 18th century, from the collection of the Museu de Arte de São Paulo (MASP) - "Francis Rawdon" (1783-1784), "Portrait of Mrs. John Bolton" (1770), and "Drinkstone Park" (1747) - were investigated using portable X-ray fluorescence (pXRF), employing a W tube anode and an XR-100CR detector. These artworks represent the only paintings by Thomas Gainsborough located in the southern hemisphere. Through an analysis of the behavior of X-ray line net areas for all identified elements in various regions of the oil paintings, it was observed that XRF accurately identified the original materials: Lead White, Calcium Carbonate, Calcium Sulfate, Bone Black, Ivory Black, Yellow Iron Oxide, Prussian Blue, Vermillion, Red Iron Oxide, Umber, and Sienna Earth. Additionally, certain regions exhibited the presence of 19th century pigments: Zinc White, Cobalt Blue, and Chrome Yellow, indicating areas that had undergone restoration. The findings presented in this study align closely with results obtained from other investigations into paintings by Thomas Gainsborough.
圣保罗艺术博物馆（MASP）收藏了18世纪晚期最具影响力的英国肖像画家之一托马斯·庚斯博罗（1727 - 1788）的三幅画作——《弗朗西斯·罗登》（1783 - 1784年）、《约翰·博尔顿夫人肖像》（1770年）和《德林克斯通公园》（1747年），研究人员使用配备钨管阳极和XR - 100CR探测器的便携式X射线荧光光谱仪（pXRF）对其进行了检测。这些作品是托马斯·庚斯博罗位于南半球仅有的画作。通过分析油画各区域中所有已识别元素的X射线谱线净面积的行为，发现XRF能准确识别原始材料：铅白、碳酸钙、硫酸钙、骨黑、象牙黑、黄氧化铁、普鲁士蓝、朱砂、红氧化铁、棕土和赭石。此外，某些区域还出现了19世纪的颜料：锌白、钴蓝和铬黄，表明这些区域曾进行过修复。本研究的结果与对托马斯·庚斯博罗画作的其他调查结果密切吻合。
