Cool! I like your scientific route! Back in the old days they'd just burn plants and use those ashes. So, depending on the plant used, the lye could provide different benefits too. I thought I had a genius idea once, "how cool would it be to use cannabis ash," but then realized, duh that is way too resinous.🤣
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I thought that I remember them saying that campfire ashes that were the remains of 'hardwood trees' basicly that excludes trees that remain green all year long (so that excludes pine, cedar, and fur trees)
I am not 100% on that part. I have seen recipes using pine tar though.
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