Foil (metal)
A foil is a very thin sheet of metal, typically made by hammering or rolling.[1][2] Foils are most easily made with malleable metal, such as aluminium, copper, tin, and gold. Foils usually bend under their own weight and can be torn easily.[2] For example, aluminium foil is usually about 1/1000 inch (0.03 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]
Foil is commonly used in household applications. It is also useful in survival situations, in the form of a "space blanket", where the reflective surface reduces the degree of hypothermia caused by thermal radiation.[2]
See also
References
- ^ Britannica, The Editors of Encyclopaedia. "foil". Encyclopedia Britannica, 6 Nov. 2008, https://www.britannica.com/technology/foil-metallurgy. Accessed 11 September 2022.
- ^ a b c "METAL FOILS". Nanoshel. Retrieved 11 September 2022.
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