101–110 of 148 posts
Earlier quoted context omitted.
Why aren't photo cells already manufactured to be like 90% mirrors then?
Some guesses: - A lot more direction-dependent. - More maintenance related to keeping the right direction, maintaining more moving parts, etc. - Less convenient form factor, more susceptible to wind, more unsightly. - Less space-efficient, which matters for some applications like house rooftop installations.
I wasn't expecting to see Dernocua at the top of HN today with 53 comments. You can download Dernocua as a whole from http://canonical.org/~kragen/dernocua/ if you're interested. I'm happy to answer any questions. (Well, almost any.)
Does aluminum foil contain PFAS and does cooking on them on the grill for example expose the food to forever chemicals?
https://www.epa.gov/system/files/documents/2025-04/foil-stud...
>Alternatively, though, it might be possible to stiffen the foil by making the equivalent of corrugated cardboard out of it, maybe using aqueous boric acid (US$1.70/kg according to Potential local sources and prices of refractory materials) or borax as the glue. The surface tension of water is ample to hold aluminum foil in place until the water dries. Hello Amazon? Billion dollar idea here. This needs more attention…
aluminum foil is generally not something you can recycle. Not that it can't be recyled, but the oxide to pure aluminum ratio is high and so you don't gain much since you need all the energy of refining in the first place to get back to something usable. Amazon needs stronger boxes than foil anyway. Cardboard is likely best for them.
Earlier quoted context omitted.
It does not, but aluminum oxide is even more of a "forever chemical" than teflon is, though less so than, for example, the nitrogen that constitutes 78% of the atmosphere.
i guess in that case the question would be if one should be as worried about the biological effects of PFAS as much as these two other forever chemicals you cite
If it's any consolation I believe it's mostly harmless.
>Alternatively, though, it might be possible to stiffen the foil by making the equivalent of corrugated cardboard out of it, maybe using aqueous boric acid (US$1.70/kg according to Potential local sources and prices of refractory materials) or borax as the glue. The surface tension of water is ample to hold aluminum foil in place until the water dries. Hello Amazon? Billion dollar idea here. This needs more attention…
Cardboard is very recyclable already.
https://www.afandpa.org/news/2024/how-much-paper-was-recycle...
It's non-toxic and food safe, and yet a significant number of people on the internet still act like it's poison that will give you Alzheimer's. I wonder how many of those people touch their lips to the lid of an aluminum beverage can. Or how they might bake a lasagna at home.
It's non-toxic and food safe, and yet a significant number of people on the internet still act like it's poison that will give you Alzheimer's. I wonder how many of those people touch their lips to the lid of an aluminum beverage can. Or how they might bake a lasagna at home.
You shouldn't use aluminum foil with tomato/lemon/vinegar/brined foods or as "grilling packets" (direct fire/high heat) because of leaching risk. There's no concern with using aluminum in most cases (with dry/non-acidic foods) but leaching is a real problem with acidic/salty/wet/high eat.
Earlier quoted context omitted.
Why aren't photo cells already manufactured to be like 90% mirrors then?
Some guesses: - A lot more direction-dependent. - More maintenance related to keeping the right direction, maintaining more moving parts, etc. - Less convenient form factor, more susceptible to wind, more unsightly. - Less space-efficient, which matters for some applications like house rooftop installations.
It's non-toxic and food safe, and yet a significant number of people on the internet still act like it's poison that will give you Alzheimer's. I wonder how many of those people touch their lips to the lid of an aluminum beverage can. Or how they might bake a lasagna at home.
Photographers and cinematographers are like: ohhh let me sit you down and tell you all about my love of blackwrap. Aluminium foil is amazing stuff. Aluminium foil adhesive tape, in particular, is incredibly useful. Being a multi-domain kind of geek the random tapes section of my tool drawers also contains mylar tape and fashion tape (or "tit tape" as a friend calls it) but the aluminium foil tape has proved to have m…