against machine spuelen bestaendiges bleikristallglas for the production of art and haushaltsglasgegenstaenden

摘要

A glass for artistic or household ware contains in wt. % SiO2 50-63, Al2O3 0.1-1, Na2O 1-10, K2O 5-15, Li2O 0.1-3, PbO 24-33, B2O3 0-2, BaO and CaO each at most 2, ZnO 0.1-3.5, MgO 0-3 and a purifying agent.