Actes du premier colloque international de l'association Verre et Histoire, Paris-La Défense / Versailles, 13-15 octobre 2005
Dr Marco VERITÀ, Stazione Sperimentale del Vetro, Venice (Italy)

Italian window glass chemical composition from the Roman time to the 18th century

Table 6 – Mean chemical composition of the main oxides in the identified glass types.
Dating and number of analysed samples belonging to each group are also reported

dating n. samples group >  SiO2 Al2O3 Na2O K2O CaO MgO P2O5 BaO Fe2O3 MnO
1-1252Na1Mean67,42,517,20,77,10,90,11 0,90,9
   Std. Dev.20,320,21,30,30,05 0,40,6
9-1626Na2Mean66,41,313,72,69,33,20,3 0,70,4
   Std. Dev.1,80,91,40,71,30,60,09 0,40,2
14-167Na3Mean671,7163,46,21,80,55 0,70,3
   Std. Dev.1,70,40,70,80,70,50,2 0,20,2
17-189Na4Mean66,11,512,64,59,82,70,52 0,70,5
   Std. Dev.2,40,40,81,31,91,10,35 0,20,3
13-1524K1Mean49,61,91,217,217,25,64,40,220,60,9
   Std. Dev.2,90,70,83,23,310,90,10,20,3
13-1632K2Mean481,40,222,520,53,41,10,30,40,6
   Std. Dev.1,60,50,1220,60,20,130,20,2
15-1626CaMean57,93,91,7622,13,22,50,30,70,7
   Std. Dev.2,50,511,31,40,30,30,170,10,2