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Why Aluminum Foil Is Glossy On One Side, Matte On The Other
By Mikelle Leow, 11 Oct 2019
Image via Shutterstock
You’ve probably asked this question before: which side of aluminum foil is the right side up?
Some might consider the shiny side as the correct end. Others stay on the safe side, cooking only with the matte part touching their food just in case the glossy end has some sort of varnish on it.
As it turns out, there’s no right or wrong side, and both ends are equally safe to use. The explanation comes from aluminum wrap producer Reynolds Kitchens, which explains that the foil looks different on both sides due to the way it’s manufactured.
The foil is produced using a technique called milling, which applies heat and tension to the material to stretch it out into thin sheets. Two layers are milled together at the same time.
“Where the foil is in contact with another layer, that’s the ‘dull’ side,” Reynolds explains. For the side that hasn’t had contact with a second sheet of metal, that’s the shiny end.
Reynolds confirms that, “The performance of the foil is the same, whichever side you use.”
If you’re been paranoid about this all your life, here’s your answer.
[via Real Simple and Southern Living, cover image via Shutterstock]
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