Why is tin foil shiny on one side?

Answer 1

i just watched your question on modern marvels episode is called aluminum, from what i can recall during the operation they put this big humongous spool of aluminum on a spindle it is very thick as it is compressed to desired specification few rollers compress the aluminum and the rolled side is the dull side leaving the opposite side shiny which is the non rolled side hope this helps or you can go to modern marvels and look up this episode on aluminum.

If you want to cook something you put the shiny side inwards, to radiate the heat inwards and your food cooks quicker and if you want to keep food cool, you put the siny side outwards to reflect the heat out wards.

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According to the manufacturer, it does not matter which side faces the food.

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They're not going to tell you if they make something that's bad for your health and they make zillions out of it ?

The composition of aluminum foil is NOT 100% pure aluminum, as many people believe. The dull shiny side is caused by a reaction when it comes in contact with air. The aluminum foil reacts with oxygen in the air to form a thin layer of Aluminum Oxide on one side of the foil. Because rolls of aluminum foil are generally rolled tightly, the inner side of the aluminum foil is not exposed to the air as much, and it remains shiny. Aluminium is made from Bauxite a sedimentary rock formed in weathered volcanic rocks. When a volcanos erupts Fluorine gas escapes, the toxic yellow element is corrosive and is 'the most reactive' of all known elements known to man.

It is also the strongest neg charged anion, F- . Like a magnet is artacted to ferrous metals, mainly iron and steel at one end it is the energy at the other end.. F- is the neg energy in atomic struture that forms some interesting minerals though thermodynamics to make Fluorides such as fluorine-containing minerals, fluorite, Fluorapatite, Cryolite and is highly reactive with calcuium to form calcium fluoride. Most of these minerals that present in bauxite! Bauxite mined then crushed, then screened and stockpiled, ready for delivery to an alumina plant. In some cases, ore is upgraded by washing, size classification, and separation of liquids and solids as clay and silica. There are no dobt varied amounts of F- ion in Aluminium as it would depend on the amount they collected in the Bauxite..

In short, the composition of aluminum foil is aluminium (Al) AND some aluminium oxide which contains the tiny F- anion.