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Aluminium foil
(sometimes
known as tin foil, although it is not made from
tin) is aluminium prepared in thin sheets (on the
order of .03 millimeters in thickness). As a
result of this, aluminium foil is extremely
pliable, and can be bent or wrapped around objects
with ease.
Aluminium foil is also widely used for insulation
(barrier and reflectivity), heat exchangers (heat
conductivity) and cable liners (barrier and
electrical conductivity). Foils in special alloys
are even used for structural honeycomb components
for aircraft.
Aluminum foil is widely sold into the consumer
market, usually in rolls of around 50
centimeters width and several meters in length.
Aluminum foils is used for wrapping food in
order to preserve it, for example when storing
leftover food in a refrigerator (where it serves
the additional purpose of preventing odour
exchange), when taking sandwiches on a journey,
or when selling some kinds of take-away or fast
food.
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