Fig. 4From: Close up to the surface: reflections on a preliminary forensic study of four Chinese bronze mirrorsa A ×40 image of residual encrustation on the edge of mirror 2. The feature extends for ~ 2 cm along the edge of the mirror and has a dark brown-grey color but lighter at the exposed edges. b Earthen crust deposit in the incisions made on the jade ring annulus attached to the back of Mirror 3. The scale to the right is in mmBack to article page