SnailsAttack
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Uncoated aluminum foil
I performed a few gravimetric experiments with some aluminum foil from the grocery store to assess how to remove the plastic lamina, but found that it
actually had no coating.
Although I assumed all foil was coated with plastic, testing showed no appreciable change in mass when treated with acetone or a lighter flame (and
furthermore, no plastic fumes).
Unfortunately the foil I tested is a local brand with no useful description. Nonetheless, uncoated aluminum foil does exist.
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Sulaiman
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I've always assumed that there is no plastic coating
(I guess that there may be some lubricating oil, probably edible)
there is normally a plastic coating/lining on the inside of Al drinks cans.
CAUTION : Hobby Chemist, not Professional or even Amateur
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Deathunter88
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Sulaiman is correct, no Al foil for kitchen use that I know of is coated. It would be a huge health hazard when heated (for example, if it's used to
wrap a chicken leg or potato for roasting over a charcoal BBQ or open fire grill).
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fx-991ex
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I think one side of oxidized and the other oiled/waxed so it do not oxidize.
[Edited on 4-4-2026 by fx-991ex]
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Fulmen
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IIRC the difference in surface texture is from the rolling process. In the final round the foil is rolled as a double layer, the outsides that
contacts the rollers will be shiny while the insides will be matte.
We're not banging rocks together here. We know how to put a man back together.
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SnailsAttack
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Quote: Originally posted by Deathunter88  | | Sulaiman is correct, no Al foil for kitchen use that I know of is coated. It would be a huge health hazard when heated (for example, if it's used to
wrap a chicken leg or potato for roasting over a charcoal BBQ or open fire grill). |
I agree that it sounds
like an obvious health hazard, but I've found a ton of sources stating that aluminum foil "sometimes" or "typically" has a plastic coating, which reads to me like it means "true unless proven false".
I looked into it further though and I think the idea of "plastic-coated aluminum foil" (referring to the kind of foil used for baking) is partially
misconceived from descriptions of the metallized films used in potato chip bags and whatever.
However, I also found that reynolds does sell a non-stick aluminum foil (specifically labeled as such) which actually is coated with some kind of plastic, I suppose for people who enjoy the
tingling sensation of microplastics settling into their brain folds
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Texium
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Our wiki is probably just wrong on that one, unfortunately, considering it doesn’t cite any source for that claim.
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charley1957
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I think Fulmen is exactly right on point. I’ve read about the process of making aluminum foil, and he is right that the difference in surface
finishes is due to a part of the rolling process.
You can’t claim you drank all day if you didn’t start early in the morning.
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