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Fig. 5 | Heritage Science

Fig. 5

From: The Samuel F. B. Morse statue in Central Park: scientific study and laser cleaning of a 19th-century American outdoor bronze monument

Fig. 5

XRF spectra acquired to monitor the laser cleaning. Examples of XRF spectra collected from the Morse statue before laser cleaning (pXRF campaign 1; black pattern) and during laser cleaning (pXRF campaigns 2 and 3; black pattern). A reference spectrum acquired from an area of bare metal (gray pattern) is also reported in each graph for comparison. The data shows a progressive decrease in the intensity of the iron peak after subsequent treatment phases

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