Just look at the first take at this site I was directed to. Stuff I never read before and so much more work. But they say this is the way. As so many others have and with all of them saying different things. Here you go for ISO:
We boil off the alcohol until the liquid is reduced to a pool of oil and all but minor bubbles cease rising at the edges and then pour in at least ten volumes of ethanol and wash out the whole pot by swirling it and washing off any resin stuck to the sides.
Using a funnel, we pour that liquid into a jar or bottle, seal it, and place that in the freezer. After about 48 hours at -18C/0F, the liquid will lose its clarity and become slightly cloudy, from marginally dissolved inactive ingredients like waxes and lipids flocculating out. There will also be precipitant on the bottom of the container. While this step isn’t totally necessary, it makes a cleaner, more pristine oil.
Next, we carefully decant and filter that liquid one more time, leaving a bell clear extract, that is ready to reduce down a final time.
We pour it into a Pyrex beaker or a stainless bain marie container for return to the oil bath and since we. have much less material, we use a smaller one container to keep film losses low.
When the oil is completely bubble I free, we remove it from the oil bath, wipe it off, and weigh it. As we know the tare weights of our containers, we subtract it from our total weight and add the rest of the required ingredients for the topical into the same container, based on the amount of cannabis oil present.
Since when do you reinfuse your ISO with ethanol??
Next here is what they say about pens. Seems this site knows no more than I. Here is a short:
This is actually round two of our portable E-Cigarette tests, with profoundly different results. In round one, we tested an E-Series e-cigarette using glycerin tinctures and subsequently with cannabis acetate oil.
Our E-Series was of insufficient watts to vaporize oil directly, and required a carrier menstruum like glycerin or propylene glycol. We conducted our experiments using glycerin, which we directly extracted the cannabinoids with, as we were never able to directly mix glycerin and cannabis oil concentrates.
That limited the potency that we were able to achieve, and while the E-Series produced medicinal effect, it was not impressive, so we switched to cannabis acetate, suspended in enough ethanol to allow saturating the wick, which we then allowed to flash off.
And even more::
We were pretty happy with the medicinal effects produced by the cannabis acetate, but as not many folks can produce it or lay hands on any, we decided to put the project on hold, until someone came up with something with enough wattage to vaporize straight cannabis oil extracts, or we had more time to devote to developing our own.
Recently we had a couple of cheeep Chinese battery packs donated to us in a joint R&D program, along with a pile of different carts to try out, and have been having our way with them. Hee, hee, hee………
We didn’t do deep supplier research, but we were able to get inexpensive mix and match components on line at:
http://www.cloudsofvapor.com/store/130-cartomizers/65-boge-cartomizers.html
There was a wide selection, but the pens we selected were under $30 each and the 510 carts that we chose were only $1.60 apiece, plus he picked up some other carts cheeeep, which looked interesting.
There were a number of other 510 cart manufacturers available, but at this point are more focused on process than who makes the best cart.
The pens were labeled with different names, though they appeared identical. The one that I ended up with is labeled Tornado-C and Joytech. According to my meter, it is putting out 3.8 volts
Let me start by announcing that there is no question that they have developed a system that is hot enough to vaporize straight oil, and deliver a full hit, so now we can move on to the nuances!!!
Thank ya’ll folks who moved the ball this far and may the Great Spirit bless you!
We started our tests using a KR-510 stainless cartridge @ 1.9/2 ohm (brand ?) and decarboxylated Absolute Amber oil, as it was easiest to load by heating it up and injecting it into the carts with a glass syringe.
Alas, while the device delivered nice effective hits, not only did some of our carts leak out the bottom, but the oil was of low enough viscosity, that if you laid the pen down, the oil would eventually slump and run out all by itself.
But quickly:
