Abstract
The potential of laser ablation in conservation of paper artifacts of cultural interest is under investigation since the second half of nineties. However, the works carried out on the topic are relatively a few as compared with those dedicated to stone, metal and painted artworks. Furthermore, in the latter cases, widespread applications have been successfully carried out, whereas laser cleaning of aged paper is still far from the conservation practice. There are serious risks to produce short- and/or long-term chemical alterations and/or mechanical damages at relatively low fluences. Here, we report a systematic investigation on laser removal of mold growths from prepared and naturally aged paper samples. Fundamental wavelength and second harmonic of QS Nd:YAG laser are tested and compared through optical and spectroscopic characterizations. This allowed defining optimized irradiation conditions and foreseeing further improvements from pulse duration optimization.
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The present study was carried out in the framework of the European Project CHARISMA (FP7 Capacities, Research Infrastructures, Grant Agreement No. 228330).
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Rosati, C., Ciofini, D., Osticioli, I. et al. Laser removal of mold growth from paper. Appl. Phys. A 117, 253–259 (2014). https://doi.org/10.1007/s00339-014-8507-z
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DOI: https://doi.org/10.1007/s00339-014-8507-z