Rene Lamontagne wrote:
On 2019-12-09 4:27 p.m., nospam wrote:
In article , Rene Lamontagne
wrote:



Why do we always say "Tinfoil" when we really mean *Aluminum foil*? :-)

because it used to be made of tin.

https://www.mentalfloss.com/article/...imes-call-alum
inum-foil-tin-foil


Thanks, I didn't know that.

Rene

They're tinfoil people, because they think they're
getting tinfoil.

Just as they think their metal hat
has some positive effects (looks attractive).

*******

The aluminum foil box, has no "ingredients" section.

This article states that the shiny side is the result
of which surface(s) touch polished steel rollers. The matte
finish side doesn't touch a roller on the last pass.

https://translate.google.com/transla...-text=&act=url
__
/ \
| |
\__/
shiny-side-leaf#1 \___ Each leaf goes to a separate box
matte-side-leaf#1 /
matte-side-leaf#2 \___ Each leaf goes to a separate box
shiny-side-leaf#2 /
__
/ \
| | === steel rollers flatten sheets and
\__/ make them thinner

It's hard to believe though, that aluminum oxide
does not form on the shiny side, and dull it. Aluminum
oxide forms virtually instantly, on the top layer
of the metal. And as time passes, chews into ("pits")
thicker metals.

And the foil really isn't all that resistant to chemical attack.

Paul