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Fig. 2 | Heritage Science

Fig. 2

From: The two-wavelength laser cleaning methodology; theoretical background and examples from its application on CH objects and monuments with emphasis to the Athens Acropolis sculptures

Fig. 2

OM photographs (a and b) and cross-sections (c and d) of real fragments of marble with thin pollution accumulations irradiated with 50 pulses at 1064 nm (FIR = 0.85 J/cm2) (a and c) and 355 nm (FUV = 0.35 J/cm2) (b and d). Dark areas on the right in a and b are reference/untreated areas, while dashed lines in the cross sections c and d indicate the border between the marble structure and the crust

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