Hi, I'm wondering if CaOH can be used in place of the NaOH used in the BLAB. If it can be used, would you use the same amount of CaOH as called for NaOH? Or is there a positive or negative ratio to the conversion? I'm able to obtain CaOH much easier and cheaper than NaOH, and and the whole food-grade part too. Thank you.

No you cant use the same way.. CaOH is very poorly soluble in water, it wont work, thats why the only teks that use it (i.e. Amor Fati and Q21Q21's tek, and 69ron's tek for mescaline) are dry teks, meaning the plant material is mixed dry with the CaOH and only a bit of water is added to form a paste and freebasing to occur. In any case you can do the mentioned teks at least for the first part until you have your alkaloid-ladden limonene, then you can follow the instructions from BLAB regarding salting if you want. Good luck

THank you for the help. One more question, could naphtha be used in place d-limonene so you could freeze-precip? The BLAB seems to closely resemble a lot of A/B teks that use naphtha.

Naphtha works fine as a substitute...just use less solvent than that specified for the BLAB.

The main nuance with the BLAB is the FASI dmt fumarate precipitation, otherwise its a lazy a/b.
I don't see why Calcium Hydroxide wouldn't work, it is poorly soluble in water but ive seen anecdotal reports of ph 12 being obtained.
Experiment is king, why not try basifying some blab'd out material with lime and testing PH, your shooting for PH 12.
If you can't get it to 12... add enough lye to do so.

Xt did you ever hear of anybody using Calcium Hydroxide successfully in a wet tek? I havent, and I have certainly read a few times of people trying and failing, so unless you know otherwise I dont think its really worth to go (or recommend) this way.

But you are right one could test if they want to I guess, specially if they have some lye at hand in case it doesnt work. Or what about adding sodium carb later on if it doesnt basify enough, which should react with calcium hydroxide to form lye ?