BROWN-RED GLASS FOR CONTAINERS OF WINE, BEER AND SIMILAR ALCOHOLIC DRINKS

摘要

The brown-red glass for containers of wine, beer and similiar alcoholic drinks presents a dominant wavelength, which is substantially equal to at least 950nm for 3mm thickness samples and therefor it is amber-red coloured, the filtering power of said glass being substantially higher than 99,5% for 3 mm thickness samples. The main components of said glass are substantially SiO2 (70 -72%); Al2O3 (1 - 2,5%); Na2O (13,5 - 14,5%); K2O (0,5 - 1%); CaO (7 - 9%); MgO (3 - 4%) and the dyeing components such as Fe2O3 (0,10 - 0,25%). The production process of the glass is characterized by a substantially neutral or lightly reducing environment of a melting tank, in order to ensure no variation of the ferrous-ferric carbonate, blast furnace slag being provided for an arrangement of the oxido-reductive, substantially reducing state of the vitrifiable mixture and dyeing compounds, such as: pyrite, ferric oxide, selenium and its compounds, coal being provided in order to obtain the red-amber colour of said glass.