Figure 3From: The use of Hand-Held XRF for investigating the composition and corrosion of Roman copper-alloyed artefactsBox and whisker plot showing the distribution of Cu, Pb, Zn, Sn, and Fe weight content of the Roman objects found at Vechten. Asterisks indentify compositional outliers, while circles with cross within identify mean values. The measurements refer to treated artefacts, that is, surface measurements for which the corrosion layer was removed.Back to article page