wonderful! thank you for the help. while i do get a few ideas its kind of hard to apply them due to infrequency and differing quality of available materials.
ive found the 5 minute mark to be my soak time by watching the color of the liquid. good to hear your experience falls in the quick to moderate wash times also.

"Not sure how much it will hold in mg/liter or if that is really the issue. Both the cannabis oil and the naphtha are equally miscible in one another at any ratio, so I'm thinking it will be more of an issue of how long it takes for the weakened solvent to dissolve the remaining material as the concentration of cannabis oil rises."

That was my underlying if some what convoluted question.
The top off sounds like a great way to keep the "fresh" naptha strength going.

THANK YOU!
without help and inspiration i would still be soaking in buckets of 70% iso. eewww.
satchmo Reviewed by satchmo on . question for uncle graywolf first off thank you so much for sharing all of your tek and knowledge. for all the interweb's info, wisdom is in short supply. i have come up with a bit of a "huh/hmm" moment whilst pulling hash. can naptha reach a saturation point when extracting? i dont have reclaim ability when boiling off so i was getting bummed at evaping all that solvent off into the air. so in the interest of efficiency in both cost and pollution, i am trying to figure out how much of a load can the fluid hold? Rating: 5