Browsing by Author "Polikreti, Kyriaki"
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Composition Profiles and Time Evolution of Buried Marble Patinas by La-Icp-Ms and Laser-Induced Micro-Photo-Luminescence
Polikreti, Kyriaki; Christofides, Constantinos (2010)The present work aims to study surface composition profiles on buried marbles as well as their time evolution. Fifty samples from gravestones, buried for up to 80 years, were analysed by laser-induced photoluminescence and ...
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Article
Fine art painting characterization by spectroscopic ellipsometry: Preliminary measurements on varnish layers
Christofides, Constantinos; Castellon, B.; Othonos, Andreas S.; Polikreti, Kyriaki; De Deyne, C. (2004)The long-term conservation of the original state of paintings requires high quality multi-spectral digital image technologies. CRISATEL Program addresses fine art professionals as primary end-users base. The analysis by ...
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Laser induced micro-photoluminescence of marble and application to authenticity testing of ancient objects
Polikreti, Kyriaki; Christofides, Constantinos (2008)For the last 70 years, the authenticity of disputable marble objects has been tested by using a black light lamp. According to empirical observations "fresh marbles are purple while ancient ones are blue under the lamp". ...
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Optical characterization of varnish films by spectroscopic ellipsometry for application in artwork conservation
Polikreti, Kyriaki; Othonos, Andreas S.; Christofides, Constantinos (2005)The specific aim of this paper is to measure the optical constants of fresh varnish layers up to a thickness of 10 mum by spectroscopic ellipsometry. It is the first time that this technique has been used in artwork ...
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The role of humic substances in the formation of marble patinas under soil burial conditions
Polikreti, Kyriaki; Christofides, Constantinos (2009)The present work aim to study the effect of burial on the photoluminescnece (PL) spectra of white, crystalline marble surfaces and the physicochemical processes that take place at the marble-soil interface. The PL was ...
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Spectroscopic ellipsometry as a tool for the optical characterization and ageing studies of varnishes used in Post-Byzantine icon reconstructions
Polikreti, Kyriaki; Christofides, Constantinos (2006)Abstract: The subject of picture varnishes has concentrated the attention of numerous researchers from various scientific fields, during the last 15 years. Although several analytical chemistry techniques have been used ...