40% recovery on a gram of thca would be 400mg of thca.
40% recovery on a gram of rosin would be 60-65% of that. Assuming a starting potency of 60-65%
Guess? non ideal… you want data from folks who have actually looked
see: In House analytics
I would guess the terp fraction is probably closer to 30%…
I’ve not had the opportunity to confirm.
Edit: High, and forgot we were talking rosin when I guessed 30%…
that was based on hydrocarbon experience. how much heat is used in achieving the separation will effect the final cannabinoid concentration in the “terpene fraction” (THC doesn’t crystallize, THCA does). there is also the additional fats and waxes usually pulled with rosin. I would expect a broader range with rosin than with hydrocarbon based extracts.
also have the distinct recollection of an actual COA in one of the jar tek threads…