Evaluation of defects in panel paintings using infrared, optical and ultrasonic techniques

Sfarra, S; Theodorakeas, P; Ibarra-Castanedo, C; Avdelidis, NP; Paoletti, A; Paoletti, D; Hrissagis, K; Bendada, A; Koui, M; Maldague, X

dc.contributor.author	Sfarra, S	en
dc.contributor.author	Theodorakeas, P	en
dc.contributor.author	Ibarra-Castanedo, C	en
dc.contributor.author	Avdelidis, NP	en
dc.contributor.author	Paoletti, A	en
dc.contributor.author	Paoletti, D	en
dc.contributor.author	Hrissagis, K	en
dc.contributor.author	Bendada, A	en
dc.contributor.author	Koui, M	en
dc.contributor.author	Maldague, X	en
dc.date.accessioned	2014-03-01T02:53:38Z
dc.date.available	2014-03-01T02:53:38Z
dc.date.issued	2012	en
dc.identifier.issn	13542575	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36458
dc.subject	Defects	en
dc.subject	Holographic interferometry	en
dc.subject	Infrared thermography	en
dc.subject	Panel paintings	en
dc.subject	Ultrasonic testing	en
dc.subject.other	Artificial defects	en
dc.subject.other	Equilibrium state	en
dc.subject.other	Holographic method	en
dc.subject.other	Integrated method	en
dc.subject.other	Physical process	en
dc.subject.other	Principal Components	en
dc.subject.other	Pulsed phase thermography	en
dc.subject.other	Thermographic signal reconstruction	en
dc.subject.other	Ultrasonic techniques	en
dc.subject.other	Crack detection	en
dc.subject.other	Defects	en
dc.subject.other	Holographic interferometry	en
dc.subject.other	Paint	en
dc.subject.other	Painting	en
dc.subject.other	Principal component analysis	en
dc.subject.other	Thermography (imaging)	en
dc.subject.other	Ultrasonic testing	en
dc.title	Evaluation of defects in panel paintings using infrared, optical and ultrasonic techniques	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1784/insi.2012.54.1.21	en
heal.identifier.secondary	http://dx.doi.org/10.1784/insi.2012.54.1.21	en
heal.publicationDate	2012	en
heal.abstract	The increasing deterioration of panel paintings can be due to the physical processes that take place during exhibition or transit, or as a result of temperature and humidity fluctuations within a building, church or museum. In response to environmental alterations, a panel painting can expand or contract and a new equilibrium state is eventually reached. These adjustments, though, are usually accompanied by a change in shape in order to accommodate the new conditions. In this work, a holographic method for detecting detached regions and micro-cracks is described. Some of these defects are confirmed by the thermographic signal reconstruction (TSR) technique. In addition, pulsed phase thermography (PPT) and principal component thermography (PCT) allow two artificial defects in Mylar to be identified with greater contrast, which is crucial to understand the topic of interest: the discrimination between defect materials. Finally, traditional contact ultrasound applications are widely applied for the evaluation of the wood quality in several characterisation procedures. Inspecting the specimen from the front side, the natural and artificial defects of the specimen are confirmed. Experimental results derived by the application of the integrated methods on an Italian panel painting reproduction, called The Angel specimen, are presented. The main advantages that these techniques can offer to the conservation and restoration of artworks are emphasised.	en
heal.journalName	Insight: Non-Destructive Testing and Condition Monitoring	en
dc.identifier.doi	10.1784/insi.2012.54.1.21	en
dc.identifier.volume	54	en
dc.identifier.issue	1	en
dc.identifier.spage	21	en
dc.identifier.epage	27	en