Bruce Velde, Directeur de Recherche Emérite CNRS, Laboratoire de Géologie, CNRS UMR 2385 – ENS (École normale supérieure) Paris (France)
Roman blown glass compositions:
following supply patterns in the manufacturing chain
Figure 3 a, b and c. Ca-Al
Figure 3a. CaO weight percent and Al2O3 contents indicating variations in the sand components for eastern France samples and Roman glass finds (diamonds) references in Figure 2.
Figure 3b. CaO and Al2O3 contents for Embiez shipwreck raw glass and eastern France finds.
Figure 3c. Comparison of CaO and Al2O3 contents for samples from eastern France and various raw glass samples from primary production sites in the Wadi Natron area (Nenna et al., 2005).
