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time travel (reddthat.com)
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[-] Th4tGuyII@fedia.io 5 points 1 week ago

If you could go back that far, you'd actually be better off taking the knowledge of a much simpler invention - soap.

While there are fancier ways to make soap nowadays, the easiest way is just mixing lye into water (slowly), add in melted animal fat or oil, mix for a while until it thickens into "trace", add whatever fragrance you want, then pour into a mould and leave to cool.

Sure you could sell this as a way to reduce disease, but you could just as easily sell it as a way to launder clothes, or clean dishware (as oil was notoriously difficult to clean back then). Your hardest chore would be getting your hands on lye, and convincing people its not witchcraft.

[-] rockSlayer 10 points 1 week ago

What? There are recipes for soap that date back to ancient Sumer

[-] ExLisper@lemmy.curiana.net 3 points 1 week ago

How about showing them how to make sandals?

[-] captainlezbian@lemmy.world 4 points 1 week ago

Nah nah you gotta introduce them to the concept of beer

[-] Diplomjodler3@lemmy.world 5 points 1 week ago

I have no idea what lye is or how to make it. All I have to fall back on are some sandwich making skills.

[-] xylol@leminal.space 4 points 1 week ago

imagine being the inventor of sliced bread, youd get so much credit

[-] grue@lemmy.world 2 points 1 week ago

Your hardest chore would be getting your hands on lye, and convincing people its not witchcraft.

Isn't that leached from wood ash or something?

[-] MonkderVierte@lemmy.zip 1 points 1 week ago* (last edited 1 week ago)

Ah right, there was this survival video about making soap from ash with a simple gravel filter.

And some of the better isekai Manga making cement by burning clams. Would that work?

this post was submitted on 14 May 2026
729 points (100.0% liked)

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