Editing Glass (section)

==== Soda–lime glass ====
{{Main|Soda–lime glass}}
[[Sodium carbonate]] (Na<sub>2</sub>CO<sub>3</sub>, "soda") is a common additive and acts to lower the glass-transition temperature. However, [[sodium silicate]] is [[water solubility|water-soluble]], so [[lime (mineral)|lime]] (CaO, [[calcium oxide]], generally obtained from [[limestone]]), along with [[magnesium oxide]] (MgO), and [[aluminium oxide]] (Al<sub>2</sub>O<sub>3</sub>), are commonly added to improve chemical durability. Soda–lime glasses (Na<sub>2</sub>O) + lime (CaO) + magnesia (MgO) + alumina (Al<sub>2</sub>O<sub>3</sub>) account for over 75% of manufactured glass, containing about 70 to 74% silica by weight.<ref name="Chawla93" /><ref name="ullmann">B.H.W.S. de Jong, "Glass"; in "Ullmann's Encyclopedia of Industrial Chemistry"; 5th edition, vol. A12, VCH Publishers, Weinheim, Germany, 1989, {{ISBN|978-3-527-20112-9}}, pp. 365–432.</ref> Soda–lime–silicate glass is transparent, easily formed, and most suitable for window glass and tableware.<ref name="Spence-2016">{{Cite book|url=https://books.google.com/books?id=KX5TCwAAQBAJ&pg=PA509|title=Construction Materials, Methods and Techniques|last1=Spence|first1=William P.|last2=Kultermann|first2=Eva|year=2016|publisher=Cengage Learning|isbn=978-1-305-08627-2|pages=510–526}}</ref> However, it has a high thermal expansion and poor resistance to heat.<ref name="Spence-2016" /> Soda–lime glass is typically used for [[window]]s, [[bottle]]s, [[light bulb]]s, and [[jar]]s.<ref name="Chemistry-explained" />