Laser cleaning on Roman coins

Drakaki, E; Karydas, AG; Klinkenberg, B; Kokkoris, M; Serafetinides, AA; Stavrou, E; Vlastou, R; Zarkadas, C

dc.contributor.author	Drakaki, E	en
dc.contributor.author	Karydas, AG	en
dc.contributor.author	Klinkenberg, B	en
dc.contributor.author	Kokkoris, M	en
dc.contributor.author	Serafetinides, AA	en
dc.contributor.author	Stavrou, E	en
dc.contributor.author	Vlastou, R	en
dc.contributor.author	Zarkadas, C	en
dc.date.accessioned	2014-03-01T02:42:51Z
dc.date.available	2014-03-01T02:42:51Z
dc.date.issued	2004	en
dc.identifier.issn	0947-8396	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/31104
dc.subject	Heat Conduction	en
dc.subject	Laser Cleaning	en
dc.subject	Yag Laser	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.classification	Physics, Applied	en
dc.subject.other	Carbon dioxide lasers	en
dc.subject.other	Composition	en
dc.subject.other	Copper alloys	en
dc.subject.other	Corrosion	en
dc.subject.other	Corrosion resistance	en
dc.subject.other	Laser pulses	en
dc.subject.other	Optical microscopy	en
dc.subject.other	Substrates	en
dc.subject.other	Surface cleaning	en
dc.subject.other	Surface phenomena	en
dc.subject.other	Thermal conductivity	en
dc.subject.other	Vaporization	en
dc.subject.other	Archaeological artifacts	en
dc.subject.other	Encrustation	en
dc.subject.other	Laser cleaning	en
dc.subject.other	Nuclear techniques	en
dc.subject.other	Laser applications	en
dc.title	Laser cleaning on Roman coins	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1007/s00339-004-2657-3	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s00339-004-2657-3	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	Ancient metal objects react with moisture and environmental chemicals to form various corrosion products. Because of the unique character and high value of such objects, any cleaning procedure should guarantee minimum destructiveness. The most common treatment used is mechanical stripping, in which it is difficult to avoid surface damage when employed. Lasers are currently being tested for a wide range of conservation applications. Since they are highly controllable and can be selectively applied, lasers can be used to achieve more effective and safer cleaning of archaeological artifacts and protect their surface details. The basic criterion that motivated us to use lasers to clean Roman coins was the requirement of pulsed emission, in order to minimize heat-induced damages. In fact, the laser interaction with the coins has to be short enough, to produce a fast removal of the encrustation, avoiding heat conduction into the substrate. The cleaning effects of three lasers operating at different wavelengths, namely a TEA CO2 laser emitting at 10.6 mum, an Er:YAG laser at 2.94 mum, and a 2omega-Nd:YAG laser at 532 nm have been compared on corroded Romans coins and various atomic and nuclear techniques have also been applied to evaluate the efficiency of the applied procedure.	en
heal.publisher	SPRINGER	en
heal.journalName	Applied Physics A: Materials Science and Processing	en
dc.identifier.doi	10.1007/s00339-004-2657-3	en
dc.identifier.isi	ISI:000222766100093	en
dc.identifier.volume	79	en
dc.identifier.issue	4-6	en
dc.identifier.spage	1111	en
dc.identifier.epage	1115	en