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Identification non-destructive des vernis des oeuvres d'art par fluorescence UV

Abstract : For centuries, varnishes applied on works of art have been prepared with natural resins. These natural products degrade in the course of time and consequently modify the visual aspect of the work of arts. Thus, restorers must reduce the layer of varnish using solvents chosen according to the nature of varnish and not deteriorating the pictorial layer. The identification of varnishes is thus essential for the choice of the apt solvent. Until now, that identification was obtained by chemical analyses using samples. With UV fluorescence, we developed a technique allowing nondestructive identification of varnishes which can be carried out in-situ and giving results in real time. This method is based on the comparison of the spectrum of fluorescence of an unknown varnish with those of a database of recent, artificially and naturally aged varnishes of reference. Examples of identification of varnishes on several works of art are presented in this work. In parallel, the first step toward the separation and the identification of principal the fluorophores contained within the resins were carried out by liquid chromatography coupled with the electrospray mass spectrometry.
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Contributor : Mathieu Thoury <>
Submitted on : Monday, July 23, 2007 - 10:05:07 PM
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  • HAL Id : tel-00164825, version 1


Mathieu Thoury. Identification non-destructive des vernis des oeuvres d'art par fluorescence UV. Physique des Hautes Energies - Expérience [hep-ex]. Université Pierre et Marie Curie - Paris VI, 2006. Français. ⟨tel-00164825⟩



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