Fiber-Optic Fourier Transform Mid-Infrared Reflectance Spectroscopy: A Suitable Technique for in Situ Studies of Mural Paintings
Fiber-Optic Fourier Transform Mid-Infrared Reflectance Spectroscopy: A Suitable Technique for in Situ Studies of Mural Paintings
复制标题
光纤傅里叶变换中红外反射光谱：一种适用于壁画现场研究的技术
作者：
C. Miliani;F. Rosi;I. Borgia;P. Benedetti;B. Brunetti;A. Sgamellotti
使用易于管理的光纤傅里叶变换中红外（mid-FT-IR）反射分光光度计对古代壁画材料进行了原位非侵入性研究。据报道，这项研究的对象是彼得罗·万努奇（Pietro Vannucci）创作的文艺复兴时期的壁画，名为il Perugino，位于圣玛利亚教堂（1521年，意大利佩鲁贾的特雷维）。采用主成分分析法对红外光谱进行首次分类和解释。由于空白、修复材料或改造产品造成的光谱伪影已经被确定，以及在蛋彩画介质中结合的两种不同的secco精细化。为了表征无机颜料，中红外光谱与其他通过原位x射线荧光（XRF）元素分析获得的数据相结合。这种互补的非侵入性方法导致了佩鲁吉诺颜料的表征，即使在复杂的混合物的存在。因此，中ft - ir无创技术与XRF相结合，被推荐为壁画检查的有价值的第一种方法，允许评估执行技术，并有助于评估保护状态。
A prototypical in situ noninvasive study of ancient mural painting materials has been carried out using an easily manageable fiber-optic Fourier transform mid-infrared (mid-FT-IR) reflectance spectrophotometer. The reported object of the study is the Renaissance fresco by Pietro Vannucci, called il Perugino, located in the church of Santa Maria delle Lacrime (1521, Trevi, Perugia Italy). For the first classification and interpretation of infrared spectra, principal components analysis was used. Spectral artifacts due to lacunas, restoration materials, or alteration products have been identified, as well as two different secco refinements bound in a tempera medium. For the characterization of inorganic pigments, mid-FT-IR spectra have been integrated with other data obtained through in situ X-ray fluorescence (XRF) elemental analysis. This complementary noninvasive approach led to the characterization of Perugino's pigments, even in the presence of complex mixtures. The mid-FT-IR noninvasive technique, in combination with XRF, is thus recommended as a valuable first approach for the examination of mural paintings, permitting the assessment of the execution technique as well as contributing to the evaluation of the conservation state.