• Doom@lemmy.world
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      2 hours ago

      In traditional tanning different chemicals are used to process leather. Brains, egg yolks, urine, they all work. The urine isn’t a requirement, it’s a possible chemical compound a tanner may choose to utilize.

    • AngryCommieKender@lemmy.world
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      4 hours ago

      While you can do it that way, I don’t know the process. I know how to make tannin by soaking oak logs in water.

      And yes, that is probably the first way we figured out how to do it, but as I understand it, that’s a very stinky process, and to be totally honest, I found tannin made from oak to be rather smelly.