Editing Stained glass (section)

===Transparent glass===
Ordinary [[Soda lime glass|soda-lime glass]] appears colourless to the naked eye when it is thin, although iron oxide impurities produce a green tint which becomes evident in thick pieces or with the aid of scientific instruments. A number of additives are used to reduce the green tint, particularly if the glass is to be used for plain window glass, rather than stained-glass windows. These additives include [[manganese dioxide]] which produces [[sodium permanganate]], and may result in a slightly mauve tint, characteristic of the glass in older houses in [[New England]]. [[Selenium]] has been used for the same purpose.<ref name="Illustrated Glass Dictionary">[https://web.archive.org/web/20100205233650/http://www.glassonline.com/infoserv/dictionary/355.html Illustrated Glass Dictionary] www.glassonline.com. Retrieved 3 August 2006</ref>