Don't know what you mean. Probably favorite build ever for mouth to lung.
Encourage everyone to read
herbivore21's thoughtful post about risks of vaping. There was a time, not long ago, when cannabis use was associated with any number of risky behaviors. Glad to see that's changing. What follows has nothing to do with avoiding risk.
Goal was e-juice as alternative to edibles. We all accumulate foul material that's still active - trim, AVB, filtrate, reclaim, etc. The only thing it seems fit for is edibles with strong flavor masking its vileness. What if that vileness could be reduced enough to mask with delicious, max VG e-juice on second coil?
Read
this old post. Activated charcoal dramatically removed chlorophyll from long ISO extraction. OP complained resulting oil had little flavor. Seemed perfect.
Extracted 15 g mystery trim with EtOH for 8 hours at 130F in MB2e. Winterized, filtered out impressive cake of precipitate. Left with this.
Stirred with 4 tablespoons activated charcoal, filtered and voila.
Evaporation gave off unusual odor while reducing to reddish oil similar in appearance to that observed in above post. Dabbed, got puffy, black residue on nail and little else. Undeterred, dissolved in 1 ml PEG 400 + 4mls PG. Vaped on above setup with AVG on second coil.
Result can only be described as nauseating. Vaped QWET of same mystery trim with decent results. How toxic can this be? Not about to find out.
Still, impressed with activated charcoal. May produce good results with better starting material.