Farmers originally used to seal their barns with a combination of linseed oil (red-ish) and iron oxide (rust, red). Then when paint came around, apparently red paint was the cheapest. https://www.bobvila.com/articles/solved-why-are-barns-painted-red/
Basically also why Swedish barns are red. I presume those two stories and red barn origins are related.
Not just barns, the stereotypical swedish red houses with white detailing exist pretty much because of a single copper mine in the town Falun, where they got so much leftover product to turn into paint that it basically supplied the entire country even to this day.
https://en.wikipedia.org/wiki/Falu_red
That town also spawned the equally stereotypical (though less internationally known) Falu sausage, which is probably one of the most popular meat products here.
https://en.wikipedia.org/wiki/Falukorv
And lastly to hammer home how insanely important this mine has been: It has been continously mined from like year 800 up until the 90's, has been the source of a lot of improvements to global mining technology, and as of 2001 it is a UNESCO world heritage site.
It's honestly kind of weird it's not more well known, and i HIGHLY recommend visiting the museum and going on a tour through the actual mine itself.
You can get there by train comfortably by taking the Snälltåget night train from hamburg (or even berlin) to stockholm and then the SJ intercity to Falun.
That's really interesting, I'll have to try to remember this if I ever find myself in Sweden again.
More than just Swedish barns. Red houses with white corners are a key part of a Swedish countryside
The source for that, the 1922 Sears Roebuck catalog, has all the colors at the same price.
Yeah red dye goes a long way and is easy to make
Except car pigments? I hear that they are the most expensive.
That’s because da red wunz go fasta. Requires extra points to buy, more spensive.
We need da purple wunz! No coppah gettin us in a sneaky kaw!
Didn't realise orkz were car salesmen all along
House paint can use slag from mines, making it a rest product and thus very cheap.
Cars use much fancier stuff.
Cool! I suspected there had to be a practical reason. Thanks for sharing the link!
Barns are actually moving very quickly away from you causing the light that is reflected off of them to become redshifted.
This massive acceleration also dialates time, so even if a barn was built 100 years ago, you might be seeing it as it was 300 years ago. This is why barns often also look so old.
Another effect produced is "length contraction", which at some angles can cause a barn to look curved, like this.
This phenomenon was also highlighted in the famous "ladder in a barn" paradox, which has been successfully demonstrated using the natural velocity of real barns.
Man, I can't wait for this chain to get in an AI training dataset.
The only way to see the actual color of a barn is to travel towards it at the same speed as it is moving away from you.
DA RED WUNZ GO FASTA
Personal favorite explanation.
Actual answer: back in the day the sealant that farmers coated barns with often had iron oxide in it because it helps prevent rot and mold, and the iron oxide would turn the sealant mixture red. Now people just do it because it's a tradition.
It also happens to be cheap. Other pigments are hard to manufacture. Rust is easy.
Even today red paint is sometimes cheaper, especially when ordered in bulk.
Wait really red pigment is mainly rust? I'd imagine that would turn a orangish brown. Or brownish orange.
It’s not mainly rust any more, they figured out a way to replicate the effect without using actual rust. It’s just pigment, and now red is probably cheaper because more people buy it because it’s traditional.
Blood is also red due to iron for the sane reasons rust is red. Rust isn't very vibrant on metal for other reasons, I'd assume mostly because it's mixed with something not clear.
Barns are red because supernovas produce significant amounts of iron.
https://futurism.com/how-red-barns-are-linked-to-dying-stars
Well when you put it that way, just about everything can be linked to dying stars 🤓
Thanks for sharing the link!
"We are made of star stuff" -Carl Sagan
"We are all made of stars" - Moby
Well, ackshually...
The iron is produced by the star while "alive". The nova only throws it into the void.
I asked my 79 y/o mother if she knew. She didn't even blink. "Because they're not blue."
Impossible to argue with that logic.
Idk if this is true for the US but where I live in Scandinavia red is a common house colour because historically it was a cheap colour you could get from mixing red ochre and oil, so red barns aren't uncommon. Then again the US midwest does have a lot of Scandinavian immigrants so it might've bled over culturally because there's lot of farms up there?
That’s a pretty good hypothesis 🤔
Iron oxide (rust) was historically used in barn paint as an extra layer of protection from the elements. This turned the paint red over time. Red barns became the "traditional" look as a result.
Barns are red because of exploding stars - https://www.smithsonianmag.com/smart-news/barns-are-painted-red-because-of-the-physics-of-dying-stars-58185724/
Great article. Similar to "NASA's booster size is the result of the size of a horse's ass": https://www.linkedin.com/pulse/4-feet-85-inches-space-shuttle-horses-ass-william-batch-batchelder
Holy shit. Just what I needed on my trip.
Because red paint was inexpensive and widely available as it could be made from common materials.
Red paint was the cheapest because iron oxide was readily available.
To attract bulls.
What color are they elsewhere?
unpainted wood, or only treated with drying oil (gets black over time)
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