Ever wonder why tin foil has a smooth side and a shiny side?
Me too.
So........... drum roll please!
The reason aluminum foil is shiny on one side and dull on the other is rather
interesting. Aluminum foil is produced by rolling it between successive steel
rollers. Each set of rollers squeezes the foil thinner. The last stage of
rolling reduces the foil's thickness to a thousandth of an inch or even thinner.
The problem is that such a thin foil is too easy to tear during the last rolling
stage. So, for the last stage of rolling, two sheets of foil are placed face to
face and passed though the final set of rollers together. Since the steel
rollers are highly polished, the foil faces that contact the rollers are also
embossed to a highly shiny surface.
After rolling, the resulting sheets
are separated from each other. The surfaces of each foil that had faced each
other are matte in texture, since they had only been squeezes against each
other, and not the polished rollers.
just thought you ought to know!
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