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Aluminum foil (2021)

dernocua.github.io

121–130 of 148 posts

Re: Aluminum foil (2021)

#121
post #93
post #75

Earlier quoted context omitted.

Let's see if this is a quantitatively plausible concern. https://en.wikipedia.org/wiki/Aluminium_chloride says orl-rat LD₅₀ of AlCl₃ is 380mg/kg, which is 20.2% aluminum by weight, so that's 77mg/kg of soluble aluminum ions. If this toxicity is due to soluble aluminum ions (rather than, say, acidity), and rats and humans are about equally sensitive to aluminum toxicity, you'd need about 3.8g of aluminum to kill a 50k…

How long does it take to leave the body?

I'm not sure, but I think that normally it reacts with phosphate ions to form aluminum phosphate rather than leaving the body.

Re: Aluminum foil (2021)

#123
post #82
post #70

Earlier quoted context omitted.

Such as?

I have used it to repair torn foil of photographic umbrellas and softboxes, seal light leaks on a repaired darkroom enlarger head, make a reflective pattern for a photo shoot, add a temporary airtight seal on a cracked tube with just two thin layers of tape. The main issue with the foil tape I have is that it is both thin and very sticky so it can be a pickle to remove. Not really tested its conductivity yet but for…

You can add a layer of another type of tape first if you need to cleanly remove it :)

Re: Aluminum foil (2021)

#124

Earlier quoted context omitted.

Imgur is not working anymore in UK :(

United Korea is best korea!

Well, AIUI, Medialab AI were told they were going to be fined for tracking children, and using their personal data, if they didn't stop ... so they blocked the UK from access.

A united democratic Korea would be great though, good call.

Re: Aluminum foil (2021)

#125
post #50

Earlier quoted context omitted.

Read this guy's ramblings and give me one cool application that he has found. Lots of "maybe it could do this!" and "it can do !"

The trick to being a good hacker is acquiring a sufficient supply of useless information, such that when that information is suddenly not useless, you have it at hand. Which is to say, it's your job to figure out what the cool applications are.

Yeah fine, take notes. Why post them here?

Re: Aluminum foil (2021)

#126

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.

how funny things work - from Napoleon serving his special guests on aluminium utensils [1] to everyone taking it for granted, even treating it as if it is toxic!

cost and availability somehow has a negative correlation to how we treat something.

[1] https://en.wikipedia.org/wiki/History_of_aluminium#Early_ind...

Re: Aluminum foil (2021)

#127
post #119

Earlier quoted context omitted.

Hi there! Thanks for the original post, and this sentence which exists in the same liminal space as the original post. Tell me more about the matter compiler as you imagine it?

You're welcome! It's a pretty broad term, with a lot of possibilities, but generally I mean a machine which, given a design for a machine in the form of digital data, can build a working machine of that design without further human interaction. Some imperfect approximations of the idea already exist: - living things such as bacteria, humans, and plants: DNA is digital, true, but it's an unsolved problem to design the…

I like the idea of the lowest technology hurdle required to build one such device. Any ideas? Seems like we must be there in terms of inventability now. A good project to work on!

Re: Aluminum foil (2021)

#128
post #26

Earlier quoted context omitted.

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.

the oxide to pure aluminum ratio is high For some definition of high? Standard foil is around 20 um thick while the oxide layer only goes about 10 nm deep.

When you melt thin al that creates more oxide as well.

Re: Aluminum foil (2021)

#129
post #107

Earlier quoted context omitted.

There's no risk to leeching, there's no data proving any link at all between Aluminum and Alzheimer's. I was a huge advocate for staying away from Aluminum cooking stuff for a long time and my mother even wound up with Alzheimer's. Simply put, I was wrong, there's no link.

> " There's no risk to leeching, there's no data proving any link at all between Aluminum and Alzheimer's. " EFSA (European Food Safety Authority) says acidic or salty foods can increase aluminum leaching from pans and foil into food: https://efsa.onlinelibrary.wiley.com/doi/pdf/10.2903/j.efsa.... This review found mixed evidence and a positive meta-analysis signal for aluminum exposure and Alzheimer's: https://www.s…

The EU is known to be far more conservative with health and safety than other areas. I focused on the risk of aluminum, not leeching because leeching doesn't matter of the aluminum doesn't cause any issues. And from what I'ce seen in the past decade, it doesn't. I was wrong.

Re: Aluminum foil (2021)

#130
post #87

Earlier quoted context omitted.

Aluminum is generally thought to be benign by most authorities. However, it is worth noting that humans were not exposed to aluminum in the environment until relatively recently, when we started extracting it from bauxite and melting it.

Aluminum is a major component of all soils, and soluble aluminum salts have been used in medicine and dyeing since ancient Greece, probably since ancient Egypt. They have been used in food preparation for at least several centuries.

These are all separate chemical compounds, though. Are you claiming they all behave the same as refined aluminium?

I'll readily sprinkle soluble sodium chloride salt over my food. I still very much prefer to keep both substances away from it in elemental form.

Note that I'm not claiming aluminium were dangerous, just that your argument is deeply flawed.

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