Abstract: A fining package for a glass composition may include a sulfate or a sulfide in an amount from about 0.001 to about 1 mol % of the glass composition. The fining package may include a multivalent compound, such as CeO2, SnO2, or Fe2O3, in an amount from about 0.001 to about 1 mol % of the glass composition. The fining package may be sulfide-free. The fining package may be free from a reducing agent for reducing sulfate to sulfide. The fining package may be free of at least one of Cl, F, Sn, Ce, and As. The glass composition may be used to form glass tubing. The glass tubing may be used to form a pharmaceutical packaging.

Abstract: The present invention relates to a transparent lithium aluminosilicate (LAS) glass-ceramic containing a ?-quartz solid solution as the main crystalline phase, the composition of which, expressed in percentages by mass of oxides, contains 60 to 67.5% SiO2, 18 to 22% Al2O3, 2.5 to 3.3% Li2O, 0 to 1.5% MgO, 1 to 3.5% ZnO, 0 to 4% BaO, 0 to 4% SrO, 0 to 2% CaO, 3.1 to 5% TiO2, 0.4 to 1.3% ZrO2, 0 to 1% Na2O, 0 to 1% K2O, 0 to 5% P2O5, 0.02 to 0.1% CoO, 0.05 to 0.25% Fe2O3, with (0.74 MgO + 0.19 BaO + 0.29 SrO + 0.53 CaO + 0.48 Na2O + 0.32 K2O) / Li2O < 0.8, and optionally up to 2% of at least one refining agent, the composition being free of V2O5 with the exception of unavoidable traces. It also relates to an article, consisting at least in part of a glass-ceramic, chosen in particular from a cooking plate and a glazing. It also relates to a lithium aluminosilicate glass, precursor of the glass-ceramic, and the process for producing the article.

Abstract: A fining package for a glass composition may include cerium dioxide (CeO2) and tin oxide (SnO2). CeO2 may be present in an amount of 0.08 to 0.5 wt % of the glass composition, and SnO2 may be present in an amount of 0.02 to 0.23 wt % of the glass composition. The glass composition may be used to form glass tubing. The glass tubing may be used to form a pharmaceutical packaging. For example, the pharmaceutical packaging may comprise an ampoule. The fining package may further include chloride (Cl) in an amount of 0 to 0.03 wt % of the glass composition. In some instances, the fining package may be Cl-free. In some instances, the fining package may be F-free. The glass composition may comprise a borosilicate glass composition. The glass composition may comprise an aluminosilicate glass composition.

Abstract: The present applicationprovides transparent glass-ceramics of lithium aluminosilicate type, of ?-quartz, the composition of which contains a low content of lithium, articles constituted at least in part by said glass-ceramics, precursor glasses for said glass-ceramics, and also a method of preparing said articles. Said glass-ceramics have a composition, expressed in percentages by weight of oxide, containing63% to 67.5% of SiO2; 18% to 21% of Al2O3; 2% to 2.9% of Li2O; 0 to 1.5% of MgO; 1% to 3.2% of ZnO; 0 to 4% of BaO; 0 to 4% of SrO; 0 to 2% of CaO; 2% to 5% of TiO2; 0 to 3% of ZrO2; 0 to 1% of Na2O; 0 to 1% of K2O; 0 to 5% of P2O5; with (0.74 MgO+0.19 BaO+0.29 SrO+0.53 CaO+0.48 Na2O+0.32 K2O)/Li2O<0.9; optionally up to 2% of at least one fining agent; and optionally up to 2% of at least one coloring agent.