Analysis of the Possibility of Lasers' Usage for Cleaning Lead and Zinc Exterior Sculpture

Abstract

The investigation of possibility of using lasers with different wavelength and pulse duration to clean the surface of lead and zinc exterior sculptures was held in this work. Comparison of lasers with different durations was done, pcs laser shown the best results in cleaning both of zinc and lead. The measuring of reflectance of corrosion layers indicates minimum in UV part of spectrum, however there were no positive cleaning results using 355nm 25 ns laser. The pulse duration is much more important parameter in preservation of surface during laser cleaning, as shown. Also, the surface state plays significant role – the technology of producing of object and its history of exposition.