this post was submitted on 26 Aug 2023
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[–] [email protected] 259 points 1 year ago (2 children)

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.

[–] [email protected] 57 points 1 year ago (2 children)

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.

[–] [email protected] 9 points 1 year ago (1 children)

Wait really red pigment is mainly rust? I'd imagine that would turn a orangish brown. Or brownish orange.

[–] [email protected] 7 points 1 year ago

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.

[–] [email protected] 3 points 1 year ago (1 children)

Also seems to be the color that degrades in the sun the fastest

[–] Hikermick 2 points 1 year ago

I thought red faded the fastest? It's always the first color to dissappear from advertisements in store windows. Also I remember hearing about people needing to get the red ink on their tattoos touched up after so many years though I think newer ink has improved

[–] nomadjoanne 10 points 1 year ago

Fascinating. The more ya know.