Editing Gold (section)

=== Miscellanea ===
[[File:James Webb Space Telescope Mirror33.jpg|thumb|A [[Optical Telescope Element|mirror segment]] for the [[James Webb Space Telescope]] coated in gold to reflect infrared light]]
[[File:Kamakshi Amman Temple with golden roof, Kanchipuram.jpg|thumb|Kamakshi Amman Temple with golden roof, [[Kanchipuram]].]]
* Gold produces a deep, intense red color when used as a coloring agent in [[cranberry glass]].
* In photography, gold toners are used to shift the color of [[silver bromide]] black-and-white prints towards brown or blue tones, or to increase their stability. Used on [[sepia tone|sepia-toned]] prints, gold toners produce red tones. Kodak published formulas for several types of gold toners, which use gold as the chloride.<ref>[https://web.archive.org/web/20160817134815/http://www.kodak.com/global/en/professional/support/techPubs/g23/g23.pdf Toning black-and-white materials]. Kodak Technical Data/Reference sheet G-23, May 2006.</ref>
* Gold is a good reflector of [[electromagnetic radiation]] such as [[infrared]] and [[visible spectrum|visible light]], as well as [[radio frequency|radio waves]]. It is used for the protective coatings on many artificial [[satellite]]s, in infrared protective faceplates in thermal-protection suits and astronauts' helmets, and in [[electronic warfare]] planes such as the [[EA-6B Prowler]].
* Gold is used as the reflective layer on some [[Gold CD|high-end CDs]].
* Automobiles may use gold for heat shielding. [[McLaren]] uses gold foil in the engine compartment of its [[McLaren F1|F1]] model.<ref>{{cite book |last1=Martin |first1=Keith |url=https://books.google.com/books?id=pUhMRLiHiY8C&pg=PA42 |title=1997 McLaren F1}}</ref>
* Gold can be manufactured so thin that it appears semi-transparent. It is used in some aircraft cockpit windows for [[Deicing|de-icing]] or anti-icing by passing electricity through it. The heat produced by the resistance of the gold is enough to prevent ice from forming.<ref name="GoldBulletin">{{Cite news |url=http://www.goldbulletin.org/assets/file/goldbulletin/downloads/Cooke_2_15.pdf |archive-url=https://web.archive.org/web/20110726122946/http://www.goldbulletin.org/assets/file/goldbulletin/downloads/Cooke_2_15.pdf |archive-date=26 July 2011 |title=The Demand for Gold by Industry |publisher=Gold bulletin |access-date=6 June 2009}}</ref>
* Gold is attacked by and dissolves in alkaline solutions of potassium or sodium [[cyanide]], to form the salt gold cyanide—a technique that has been used in extracting metallic gold from ores in the [[cyanide process]]. Gold cyanide is the [[electrolyte]] used in commercial [[electroplating]] of gold onto base metals and [[electroforming]].
* Gold chloride ([[chloroauric acid]]) solutions are used to make colloidal gold by reduction with [[citrate]] or [[ascorbate]] [[ions]]. Gold chloride and gold oxide are used to make cranberry or red-colored glass, which, like [[colloid]]al gold suspensions, contains evenly sized spherical [[gold nanoparticle]]s.<ref>{{cite web |url=http://chemistry.about.com/cs/inorganic/a/aa032503a.htm |title=Colored glass chemistry |access-date=6 June 2009 |archive-date=13 February 2009 |archive-url=https://web.archive.org/web/20090213164051/http://chemistry.about.com/cs/inorganic/a/aa032503a.htm |url-status=dead }}</ref>
* Gold, when dispersed in nanoparticles, can act as a [[Heterogeneous gold catalysis|heterogeneous catalyst]] of chemical reactions.
* In recent years, gold has been used as a symbol of pride by the [[autism rights movement]], as its symbol Au could be seen as similar to the word "[[Autism spectrum disorder|autism]]".<ref>{{cite web |date=2 April 2021 |title=Why 'Going Gold' is important on Autism Acceptance Day. |url=https://edpsy.org.uk/blog/2021/why-going-gold-is-important-on-autism-acceptance-day-2nd-april/ |website=Edpsy}}</ref>