Fig. 1From: Identification of an unusual pale green material on the surface of an ancient Chinese bronze vessel and application of laser cleaning to its removala The square bronze Gu vessel with a total height of circa 36Â cm. b Lower part of the Gu vessel. c Enlarged view of an area shown in (b) demonstrating concentration of pale green material in micro cavities. Area of the red square: circa 1 cm2. Scale bar in (c): 2.0Â mmBack to article page