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container glass
Container glass is a type of glass for the production of glass containers, such as bottles, jars, drinkware, and bowls. Container glass stands in contrast to ''flat glass'' (used for windows, glass doors, transparent walls, windshields) and ''glass fiber'' (used for thermal insulation, in fiberglass composites, and optical communication).
==Composition==
Container glass has a lower magnesium oxide and sodium oxide content than flat glass, and a higher silica, calcium oxide, and aluminium oxide content.〔"High temperature glass melt property database for process modeling"; Eds.: Thomas P. Seward III and Terese Vascott; The American Ceramic Society, Westerville, Ohio, 2005, ISBN 1-57498-225-7〕 Its higher content of water-insoluble oxides imparts slightly higher chemical durability against water, which is required for storage of beverages and food.
Most container glass is soda-lime glass, produced by blowing and pressing techniques, while some laboratory glassware is made from borosilicate glass.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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