This is pretty much just rambling about how amazing aluminium foil is because it's so thin and that might enable all sorts of wonderful imaginary applications. Very HN. It's aluminium foil.
1. Recycling was a vague concept in the 80s & 90s
Which is to say, it's your job to figure out what the cool applications are.
You understand the rest of us do actually exist, right? That we’re, you know, real people with thoughts and opinions and feelings, right? This isn’t pinboard or something.
If so, what is wrong with you?
I didn't post my notes on HN; in fact, I didn't even post them on dernocua.github.io.
https://en.wikipedia.org/wiki/Anodizing
When exposed to air at room temperature, or any other gas containing oxygen, pure aluminium self-passivates by forming a surface layer of amorphous aluminium oxide 2 to 3 nm thick,[4] which provides very effective protection against corrosion. Aluminium alloys typically form a thicker oxide layer, 5–15 nm thick, but tend to be more susceptible to corrosion.