Differentiation of paints based on natural and synthetic ultramarine of the XIX–XXI centuries by infrared spectroscopy and multifactorial analysis

Andreev I.I., Basmanov M.D., Smolyanskaya, O.A.

For Russian citation (Opticheskii Zhurnal):

Андреев И.И., Басманов М.Д., Смолянская О.А. Дифференцирование красок на основе натурального и синтетического ультрамарина XIX–XXI вв. методом инфракрасной спектроскопии и многофакторного анализа // Оптический журнал. 2025. Т. 92. № 10. С. 57–65. http://doi.org/10.17586/1023-5086-2025-92-10-57-65

Andreev I.I., Basmanov M.D., Smolyanskaya O.A. Differentiation of paints based on natural and synthetic ultramarine of the XIX–XXI centuries by infrared spectroscopy and multifactorial analysis [in Russian] // Opticheskii Zhurnal. 2025. V. 92. № 10. P. 57–65. http://doi.org/10.17586/1023-5086-2025-92-10-57-65

For citation (Journal of Optical Technology):

Abstract:

Subject of the study. Spectral properties of paints based on synthetic ultramarine and lazurite with various binders and technical fillers of the 19th–21st centuries. Aim of study. Experimental study of reference ultramarine paints of the 19th–21st centuries by infrared spectroscopy using multivariate analysis to determine the origin of the pigment. Method. Mid-infrared spectroscopy with the attenuated total internal reflection accessory, multiparametric analysis of the spectral data array with clustering. Main results. The spectral properties of 38 reference paint samples of the 19th–21st centuries of synthetic ultramarine and lazurite were studied, technological paint fillers and natural impurities of lapis lazuli were identified according to the mid-infrared absorption spectra. It is shown that clustering of spectra after decomposition of the data array by the principal component method in the wavenumber range of 900–800 cm–1 using the k-nearest neighbor method and calculation of Euclidean distances makes it possible to determine the origin of the ultramarine pigment. Practical significance. The results of the study of the spectral properties of blue paints based on synthetic ultramarine and lapis lazuli obtained in the work will serve as the basis for the development of methods for differentiating pigments using multiparameter data analysis methods.

Keywords:

ultramarine, lapis lazuli, pigment, infrared spectroscopy, multiparametric methods, clustering

Acknowledgements:

the research was carried out with the support of a grant within the framework of the Decree of the Government of the Russian Federation dated April 09, 2010 № 220 (Agreement dated June 01, 2021 № 075-15-2021-593)

OCIS codes: 300.1030, 300.6300, 300.6340, 070.6020

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