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Very interesting! I've saved off a copy and I may try that!

I finally used my soap, about 8 months later! It has been sitting loosely wrapped on a bathroom shelf to dry and cure, and then I didn't bother trying it out until the current bar of soap finally got used up—which was slow, as I've been preferring our refillable foaming soap dispenser. Notes...

Here's what I ended up using: - 75 g used vegetable oil (mix of olive, sesame, sunflower, and peanut) - 9.65 g NaOH crystals (Rooto drain cleaner "100% lye") - 21 g water Making a small test batch actually made it harder, since I had to use the milligram scale and couldn't use the stick...

Cool, I've been looking for info on this sort of thing! One question I still have is whether the frying process changes the saponification factor in any meaningful way. I know there are a lot of chemical changes that happen in deep-frying, but I don't know the specifics and I'm not sure at what...