Fig. 4: Energy spectrum maps of copper (Cu), tin (Sn) and lead (Pb) elements in some artefacts.
From: Archaeometallurgical analysis of early Qin bronze thin sheets from Shaanxi China
a The Cu map of sample M2:38-1; b The Sn map of sample M2:38-1; c The Pb map of sample M2:38-1; d The Cu map of sample M2:38-2; e The Sn map of sample M2:38-2; f The Pb map of sample M2:38-2.
