Fig. 14 | Heritage Science

Fig. 14

From: Identification of an unusual pale green material on the surface of an ancient Chinese bronze vessel and application of laser cleaning to its removal

Fig. 14

Before (a, c) and after (b, d) laser cleaning of test areas with irradiation in SFR regime using the same spot size and frequency with LQS regime. b Inefficacy cleaning with localized discoloration using lower fluence (3.4 mJ/cm2). d Removal of both unwanted material and patina with extensive discoloration using higher fluence (5.6 mJ/cm2). Scale bar: 1.0 mm in (a) and (b), 5.0 mm in (c) and (d)

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