Foil (metal)

{{Short description|Thin sheet of metal}} [[File:Aluminio.jpg|thumb|A roll of aluminium foil|alt=Refer to caption]]

A '''foil''' is a very thin sheet of metal, typically made by hammering or rolling.<ref>Britannica, The Editors of Encyclopædia. "foil". Encyclopædia Britannica, 6 Nov. 2008, [https://www.britannica.com/technology/foil-metallurgy. https://www.britannica.com/technology/foil-metallurgy.] Accessed 11 September 2022.</ref><ref name=":0">{{Cite web |date= |title=METAL FOILS |url=https://www.nanoshel.com/metal-foils |access-date=11 September 2022 |website=Nanoshel |archive-date=5 April 2023 |archive-url=https://web.archive.org/web/20230405075658/https://www.nanoshel.com/metal-foils |url-status=dead }}</ref> Foils are most easily made with malleable metal, such as aluminium, copper,<ref>{{cite news |title=A shortage of copper foil will drive up prices for the red metal |url=https://metals-news.com/base-metals/a-shortage-of-copper-foil-will-drive-up-prices-for-the-red-metal/ |archive-date=2023-07-22 |access-date=2023-07-22 |archive-url=https://web.archive.org/web/20230722161343/https://metals-news.com/base-metals/a-shortage-of-copper-foil-will-drive-up-prices-for-the-red-metal/ |url-status=dead }}</ref> tin, and gold. Foils usually bend under their own weight and can be torn easily.<ref name=":0" /> For example, aluminium foil is usually about {{convert|1/1000|in|mm}}, whereas gold (more malleable than aluminium) can be made into foil only a few atoms thick, called gold leaf. Extremely thin foil is called metal leaf. Leaf tears very easily and must be picked up with special brushes.{{Citation needed|date=September 2022}}

==References== <references/>

{{DEFAULTSORT:Foil (Metal)}} Category:Metalworking