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Heritage Science
Fig. 1 | Heritage Science

Fig. 1

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. 1

a surface photo of a gypsum-charcoal technical sample irradiated with 1064 nm (10 pulses at FIR = 1.5 J/cm2) and a combination of 1064 nm and 355 nm (10 pulses at FIR = 1.5 J/cm2 and FUV = 0.9 J/cm2). The width of the reference stripe is 5 mm. b–d SEM photos of reference-untreated b, IR c and UV d irradiated technical samples at the above-mentioned parameters

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