Nevertheless, extreme care should be taken for the optimization of the operational parameters in order to ensure the absence of any negative effects induced on the artwork.Ītmospheric pollution influences art works in different way and with a rate dependent on changes in environmental humidity and temperature. Laser cleaning must be considered as an advanced tool applied in cases where traditional techniques may be inadequate. Specific properties of lasers, decrease of system costs, and reduction of dimensions of laser cleaning systems have contributed to increasing applications of lasers in conservation, particularly during recent the ten to fifteen years. Selective and precise interaction of the light beam is a fundamental advantage of non-invasive treatment of more or less tightly connected unwanted surface layers. Application of laser technique gives possibility of almost full control of the encrustation removal process at the surface of art works. Moreover, every detail requires individual, predetermined cleaning parameters. Application of conventional conservation methods is limited and difficult. Conservation practice shows the necessity of frequent treatments of sophisticated objects with complex technological structures and individual preservation states, resulting from the influence of diverse external factors, as well as changes in original material on construction itself. Chemical reagents show similar interactions in the conservation of paintings, where chemicals penetrate technological painting layers and causes permanent, difficult to analyze, cross-sectional alterations. Cleaning of delicate objects, diverse from the point of view of materials composition needs not only extended expert appraisements of used substances, but also minimization of possible damages, always present in the case of mechanical cleaning. These traditional methods are very difficult to control. Results of laser spectrometry analyses (LIBS, Raman) will illustrate identification and dating of objects superficial layers.Ĭommonly used methods of surface cleaning in conservation of art works are based on mechanical or chemical techniques which are individually selected by experienced conservators. colorimetry, scatterometry, interferometry), infrared thermography, optical coherent tomography and acoustic measurements for “on-line” evaluation of cleaning progress. It includes, tested in our laboratories, optical surface measurements (e.g. ![]() Paper presents application of different, selected physical sensing methods to characterize condition of works of art as well as laser cleaning process itself. This method is non-contact, selective, local, controlled, self-limiting, gives immediate feedback and preserves even the gentlest of relief - the trace of a paintbrush. One of the physical methods that is becoming more and more popular for dirt removal is the laser cleaning method. The main tasks of conservators of artworks and monuments are the estimation and analysis of damages (present condition), object conservation (cleaning process), and the protection of an object against further degradation.
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