The application effect of laser cleaning technology in stone sculpture cleaning is very significant. According to the search results, laser cleaning technology can effectively remove dirt and coatings on the surface of stone sculptures without causing damage to the stone sculptures themselves. The following are some specific application cases and effect evaluations:
1. In the Palace Museum, laser cleaning technology is used to clean marble cultural relics. By using dual-wavelength laser cleaning that combines infrared and ultraviolet, black crusted contaminants on the surface of stone cultural relics can be effectively removed without causing damage to the cultural relics themselves. Experimental results show that when the infrared and ultraviolet energy are 16.8mJ and 1.2mJ respectively, it has a good cleaning effect on thick black crusted pollutants.
2. In another study, picosecond laser cleaning technology was used to clean marble artifact samples. The experiment found that the optimized cleaning parameters are laser power 18W, scanning speed 1000mm/s, and cleaning times 8 times. After cleaning, the proportion of sulfur element, the main pollutant, dropped by 94.57%, and the surface roughness of the area after cleaning was 1.267 μm. Taking into account the proportion of pollutants and surface roughness after cleaning, the overall effect of picosecond laser cleaning is better than that of nanosecond laser cleaning.
3. Laser cleaning technology is also used to clean marble sculptures from the Roman Empire and plaster sculptures from the National Gallery of Athens. The study found that using 1064nm near-infrared light alone will cause yellowing, but combined with 355nm ultraviolet light for cleaning, a better cleaning effect can be obtained without damaging the cultural relics themselves.
4. In China, laser cleaning technology has also been applied to the cleaning of stone cultural relics, such as Yungang Grottoes, Huashan Rock Paintings, etc., and has achieved good results, and operating process specifications for laser cleaning of surface contaminants of stone cultural relics have been established.
In summary, the effect of laser cleaning of stone sculptures is very significant. It can not only effectively remove pollutants on the surface of stone sculptures, but also protect cultural relics from damage. It is a safe, efficient and environmentally friendly cleaning technology.
