We report here the results about the sulphur concentration in ancient stones and its removal after the application of UV laser action. A portable apparatus for energy-dispersive X-ray fluorescence (EDXRF) was utilised to measure the sulphur concentration before and after laser cleaning. After laser application the sulphur concentration decreased to 1.2% w/w whilst the initial value was 2.8% w/w. The laser energy density was about 1 J/cm2 and the efficient shot number was approximately 30 with a rate of 1 Hz. (4 refs.)
Ab initio selective UV laser cleaning
BELLONI, fabio;BUCCOLIERI, Giovanni;CASTELLANO, Alfredo;DORIA, Domenico;LORUSSO, ANTONELLA;NASSISI, Vincenzo
2005-01-01
Abstract
We report here the results about the sulphur concentration in ancient stones and its removal after the application of UV laser action. A portable apparatus for energy-dispersive X-ray fluorescence (EDXRF) was utilised to measure the sulphur concentration before and after laser cleaning. After laser application the sulphur concentration decreased to 1.2% w/w whilst the initial value was 2.8% w/w. The laser energy density was about 1 J/cm2 and the efficient shot number was approximately 30 with a rate of 1 Hz. (4 refs.)File in questo prodotto:
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