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Old 12-05-2016, 08:04 PM #11
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Originally Posted by Gray Wolf View Post

I rounded off at 29.5" to throw in some safety factor for gauge calibration and ability to actually read on most gauges, but -29.8", or +.12" Hg (3048 microns) is closer to the edge where we appear to lose our dance with the devil.

If we're not controlling vacuum by bleeding in N2, we may pull lower than 29.5" Hg, but I limit it to about 3050 microns.
Nice! Conveniently, the pump I used for the better part of my first two years of working with this fine oil would pull to a minimum of 3300 microns. I've even purged shatter for anywhere from 48-100 hours, with my vacuum pump continuously running. Not once did it nucleate good material, especially considering I almost always ran cold extractions (<33░F). It's not the best way to preserve a flavor profile (purging at 3300 micron), but I'll say some pretty tasty -and super smooth - dab has still been managed that way.


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Originally Posted by Gray Wolf View Post

Clearly a bragging rights return. Judging from the cloudiness, some of that weight may be plant wax.

What temperature did you do the extractions at?


For this reason, I would suggest separating the soaks into separate slabs....at least separate the first two from the last two, but I often recommend the first soak alone.

SH: You appear to have used Pyrex, and poured or scraped that onto parchment, correct? Not on silicone here?
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Old 12-05-2016, 10:13 PM #12
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Originally Posted by Gray Wolf View Post
Aroma, flavor, effect? Objective, but still the test of the pudding....:dance01 3:


I'm extremely slow at pulling descriptive language out of the air, but you're right I think that looking at it someone might think maybe $25/g (retail, here in SoCal,) but looks taint everything... so let me say it has a regal tone with a death stroke of power befitting it's name, Lil Dragon. Indica, but no old fogy couch lock dragon, a squire of an all day high flyer.

I used two cans of a clean lot of the original Puretane n-butane, the extraction was done using a Mason jar open at ambient, so the extraction temp was at the Bp of n-butane, 32F. The first soak pour off was the lightest yellow piss tint I've ever seen, any brighter and I could say electric.

That's a Corning ceramic dish with a Pyrex lid,

https://en.wikipedia.org/wiki/Evaporating_dish

I use Stator Bros generic parchment paper, which does have a silicone coating, just like most other brands out there.

Btw, I tried the silicone coated kitchen spatula, the oil adheres to it but lets go fully to a stickier material. I collected the remaining oil onto a SS spatula, extreme agitation, you guys wouldn't have included that part of the scrape with the rest out of fear of nucleation, ratted the heck out of it, and it just melted in with the rest of the patty. Go figure.

Which brings me to why I say 115F down to -29.5" Hg. It was 20,000 microns when I first started preaching this,

(3/6/'13 - SkyHighLer)

"▀-caryophyllene
Boiling point: 119*C / 246.2 degree Fahrenheit
Properties: Antiinflammatory, Cytoprotective (gastric mucosa), Antimalarial

https://en.wikipedia.org/wiki/Caryophyllene

seems to be the first to boil off, according to this info:
https://www.tokecity.com/forums/showt...39#post1227139

Since caryophyllene starts to boil off before THC, I made a data table of some of it's boiling points under vacuum just like I presented for THC. What you want to do is stop pulling your vacuum at about the 20,000 micron level and keep your temps below about 120F. That way you'll still be boiling off the trapped butane and moisture, but leaving all the oil components intact and unstressed, and all you'll ever get is sap.....imo."

https://www.tokecity.com/forums/showt...=1#post1294586


I noticed GW was saying 115F/-29.5" Hg in a thin film, and agreed that was a good stand.


As you can see from my micron meter readout, I don't go all the way down to -29.5" Hg (~10,000 microns as GW pointed out,) I stop at about the 20,000 micron level(-29.15" Hg) so I have plenty of room for overshoot. I recall seeing a low of about 13,000 microns this purge.


Interesting about the color, the trichs were clear (see pic,) so from the nice yellow first soak pour off, each subsequent pour off was still yellow or in the final pour off, clear. What I find interesting is just how green the butane/oil solution in the jar appears from the finely ground material, and that the 2.5 micron filter paper holds it all back.


One of my reasons for posting up is to counter the assertion that high cannabinoid strains often come out wax. Knock on wood it didn't happen to me, scrapping, agitation, what did I do differently?

Thanks again for the kind words!!
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Old 12-09-2016, 09:43 PM #13
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Thanks for the info been running everyday and not posting anything. My main problems were too low of heat, too long of purge time for the smaller amounts I'm doing, and scraping. I may try pulling a vac on my collection chamber after I recover most the butane and scrape then..
Here is some crumble that I scraped the next day after running for headstash. I was getting gooey mess sugar before this current light crumble awesomeness.

First is my old Tek, second is improved vac method but I still scraped collection chamber, third is crumble from hard scrape.
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Old 12-09-2016, 09:44 PM #14
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Going to check the oven to see if everything is warm it's been an hour since I put them in preheated oven.
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Old 12-21-2016, 05:41 PM #15
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Haha never came back to update this! Running all day so I will share my purge results
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Old 12-21-2016, 10:24 PM #16
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I started today by scraping the leftover from my last run. It was a indoor trim run with lots of small buds, strain was Bruce banner. It's been sitting a week or so in the open. Gonna do a purge on it to see if it comes out shatter or sugar or crumble. Just set it in the oven at 105 preheat. Turned the heat up to 115 and going to let the concentrate come to temp and pull a hard vac.
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Old 07-18-2018, 10:18 PM #17
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Quote:
Originally Posted by SkyHighLer View Post
^ you don't know what you're missing...


I usually use my calibrated dial gauge to make sure I never go below -29.5" Hg, today I used the micron meter exclusively, and found it much easier to follow the pressure level.

$300/oz MMJ delivery nuggs, SCLab's found ~30% cannabinoids.

27.9g nuggs

9.90g product

35.5% return

~30/g for what I think is awesome oil, not too dark considering I ground the starting material, and soaked it four times in n-butane.


115F down to -29.5" Hg in a thin film, pulling several muffins, and when the bubbling slows way down it's done. Less than an hour in the vac chamber today. Stable shatter, it won't ever turn to wax.
How do you grind? How dry is the bud?
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Old 07-19-2018, 01:06 AM #18
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Ground as in a metal herb grinder, a large two piece Cosmic. Must of been extremely dry to get that high of a return percentage, sorry I don't remember specifically.
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Cannabis Alchemy by D. Gold
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Hash oil techniques and solvents for non BHO hash oil?
https://www.icmag.com/ic/showthread.php?t=338633

Solvents listed as to polarity
https://www.icmag.com/ic/showpost.ph...&postcount=162

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