Just Say Know said:
can you substitute pickling lime for the Lye? in theory i'd assume you could but then again i'm really inexperienced with synthesis and extraction and am still learning.
hoping to start with food safe extractions as the chemicals are easier to work with and easier to obtain.
No.
Lime works with dryteks on cactus, dmt containing plant materials, and thats about it. It also works very good for freebasing impure dmt salts so you can pull with acetone or a np to get pure freebase dmt.
For the purpose of a aqueous caapi extraction, you need a base that will dissolve in the water. Caoh (lime) doesn't do that. Lye/koh (potash, potassium hydroxide) does and thats why its used.
And BTW, you can get food safe lye if you want, its used to make pretzels. But if you pay attention when your extracting, and aren't foolish you don't need food safe chemicals since you didn't bring over any contaminants into your end product.
Don't think you need food safe supplies/teks to get a safe to use product, if you don't want to work a little harder or think about the process more in depth, then yes, go food safe, but imho that's a copout for not learning how to properly and safely extract alkaloids and perform the teks described on this site.