Forum fi.ir Restauratoren, Konservatoren und Denkmalpfleger
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FI;LDFORSCHUNG UNTERSUCHUNG VON ARCHITEKTUROBERFLACHEN DIE KATHEDRALE VON LAUSANNE OLYMPIA-AUSGRABUNG VOR 50 JAHREN ARCHAOMETRIE W.ND DENKMALPFLEGE REIN IGUNG VON ACRYLFARBENOBERFLACHEN LASERANWENDUNG IN DEUTSCHLAND UNO ITALIEN REMOVAL OF GRAFFIT I BY LASER
www.restauro.de
4 Juni 2009
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Olympia·Ausgrabung vor50 Jahren
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Aeinigung von Actylfacbenol>erniichen
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RESTAURO AKTUELL , "
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RESTAURO THEMEN
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Kar l J . Faltermeier
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Ze itteise
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Meine Tei lnahme an der Olympia-Ausgrabung vor 50 Jahren
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l aseranwendungen
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Paui-Bernhard Ei pper
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Problem fall A crylfarbenobernachen Teil 3: Untersuchung von Veranderu ngen nach einer Oberflachenreinigung un d Entwlcklung eines Reìnigungsablaufes
Richard Ollig. Gasparè Massimo Ventimigl ia ZerstOrungsfreie Untersuch ungen von Mauervo.rerk u nd h istorischen Putzen Thermografie- und Radarmessu ngen an der Fassade der Ki rche San Giovanni d ei Napoletani in Palermo/ Sizilion
G. oa ..,relio, S. E. Andriani, A. Albanese, l. M. Catalano, O. Marano, G. Teseo 259
The Removal o f W ritìngs, Graffiti an d Pai ntings Exempiified an the Exterior Walls and t ho Façade of the Cathedral .. S. Nicholas•·
of Trani (ltalyl by Means of Different Laser Techniques
RESTAURO RUBRIKEN 266
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Abstracts Autoren
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Term ine
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Stellenanzeigen
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tmpressum RC:.l ALEO 4/2009
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Removal of Gt"atf,u by Laser
Warum? Weil dje Norls Blattgoldfarbrlk weltweil dle elnzige Firma 1st, die ... • • • •
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Blattgold In 32 verschiedenen Farben Rollengold in allen Blattgoldfarben Blausllber, RolleiUilber Pudergold und Pudersilber In Plattchen und Kugelform bis 3~ • Muschelgold und Muschelsllber, Malergoldlac:iS, jarnb and some bhnd archos of the belltowerwere
The conservatiVe restOtatJon was aimed at the removal of 1ne vartC>Us wnungs and dOS!gns from lhe external walls of 1he Ca1hedrat, respectirlg lhe
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Ovor timo. tho laçnrlo of tho c:hurch had bee n exposò(t IO onvhonmon· lallnlluenc(IS such at t un, rain. wind, IR ond UV rodiallon. as well as lo • manne climtlte
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covered wnh graft •t• aod had 10 be cleaned. Photograohic mapomg and visual exam1nauon was car· ned out in order to rdentrfy tho dgh relleclrvoty of those su~ stancas to > . 1064 nm and 532 nm). 2. The lens adaptation to shon focal endangers the safe1y of lhe opero1or. 3. A shon focnllons produces highar energv den· si tv: on 1he o ther Mnd. the local SpOI is small· er(in geometrie dnllenstOns): the substrate (stono and other matenals) is therefore more easily damaged, when orroncously work1ng with a fo-
Due 10 its geometrie dtmens ons at the ourput of the laset source. the iaser bea m would no1 produce good results (g!Ven tno 10w ene
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Lenses wnh a short focallength 10.4 and 0.5 m) are four trmes more effectrve1n resotvtng 1he problems poonted 001 above (po•nts 1-4. in penìcular poontl ). Funherrnore. the use of a shorl local length lens produces a laser beam that doverges 1mmedoately aflet the opucal reC!angular focus. wtuoh JS sa.fcr tcr tho person operaoing itand for potonlla! spectatocs. This 1echnique can damage the subwate if lhe focused reclangular beam. in ""knife biade·· shape mode, works an the surface. Expert handJtng will reduce thosc nsks. Bv lhe S
