Fluorescence of oil colors under N2 laser excitation and its application to the identification of pigments and dyestuffs

窒素レーザー励起による油絵具の発光と絵画の顔料同定への応用

Fluorescence of oil colors under N2 laser excitation and its application to the identification of pigments and dyestuffs

Creators Miyoshi Tadaki

Creators Ikeya Motoji

A study of the fluorescence of oil colors subjected to pulsed laser excitation was made using an N2 laser (λ=337.1 nm, pulse duration ≒5ns) to measure the fluorescence spectra in various oil colors. The fluorescence spectra (spectral shape, peak wavelength, and peak intensity) observed were different for different pigments. Therefore, these spectra can be used to identify pigments in oil paints. For instance, the pigments in the red parts of and oil painting can be determined by measuring their fluorescence spectra. Consequently, oil painting forgeries can now be detected through this kind of pigment investigation since different pigments have been used in different times in history, and therefore produce distinctive spectra. The advantages of this laser-induced fluorescence method are that it is a non-destructive method and can be applied to pigments and dyestuffs.

[ISSN]0368-6272

[NCID]AN0009328X