Good article:
How to Winterize Rosin: A Complete Guide
video & article by
John Brown
Uses a
.22u syringe filter
HASH OIL : Below article taught me finally after many attempts—
Great Article:
June 28, 2017
CANNABIS OIL QWET EXTRACTION BATTLE OF THE WASH: DRY ICE VS. FREEZER
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My pure oil technique:
—Homemade (licensed MO Medical Cultivator))
I usually use about 12 to 14 ounces Everclear to 1 ounce herb… 25 minute soak @
-50/-60f range IN cooler with Dry-ice on top on a screen in cooler, because the gas goes down when it evaporates…
(extremely important to keep -50 f cold until 1st filtering completed),
Of course alcohol and herb are in separate Mason jars at this point … Once The alcohol and herb are combined gentle stir 3 or 4 times during 25 minute soak, & shut cooler lid…((4 Oz Max per run for me, Grind herbs using kitchen “glass peanut hand grinder”— comes out about twice the size of joint material))
1st Filtering: After soaking herb/alcohol…1st filter off “very fast” while cold using 75um filter (I use ice Hash bubble bags, they separate alcohol oil wash VERT fast),
2nd filtering use a 25um filter (use the 25 µm bubble bag or a brown coffee filter which is also 25 µm, this removes the remaining sediment) , Obviously the first filtering is the most important (remember the whole purpose of the super low freezing temperature is to isolate all of the “”fats, waxes and chlorophyll””
that you do not want in your Vape oil)…
Now, Evaporate using hot plate or electric skillet (Or let it evaporate naturally in the sun covered with cheese cloth, and no you will not degrade THC continent In a short period) & alcohol mixture in Pyrex dish on top… I like to keep skillet temperature under 160f this keeps the alcohol usually under 140f… I preserve many Terps, but I am not a Terp hunter !!!
When the alcohol mixture has reduced to a couple of ounces, pour it into a very small glass thick jar that you plan on storing the oil in. (Like a used Penzi spice jar)…
(you will also use this jar to remove all of the remaining alcohol and whatever water is in it, I do this by putting it on the hot plate of my coffee machine or a skillet keep temperature under 160°, sometimes this is the longest process step because you occasionally stir the oil with a toothpick and if there’s “any any any”micro bubbles at all you are “not done”… for those of you that want to argue alcohol evaporation is 100% & food grade.)
Pretty much comes out the same every time 4–4.5 Gr net oil per Oz. basically 30% free of undesirables -fat, wax , chlorophyll, etc difference in my avg is yield which obviously is based on cannabinoid continent percentage…
Estimated oil potency using GSC Auto —Garden of Green (22% Thc) is
75–80% Thc easy…!!!
Again estimated
(note, I do NOT use trim & leaf for the cold process…I only use them for dry sift Hash , unless of course I’m just making oil for my gelatin capsule edibles mixed with a dab of peanut butter.
In that case I’ll just use the refrigerator freezer to lower the temperature of my alcohol/herb in separate jars 24 Hrs & mix for ~5Min., & filter/evaporate/ and store. It picks up some undesirables but you are not vaping it only consuming.
DONE
Notes:
What’s needed:
—large or medium mason jars (I prefer large for any size application)
—Herb
— generic Everclear
(or any 190 proof food grade alcohol only), I do “not” use isopropyl alcohol, yes it’s cheaper but has contaminants. isopropyl alcohol is good to have around for cleaning hands, but not for anything you are going to consume
—Cooler Big enough for your application.
(I use a 20” deep x 18”plastic insulated cooler)
— 8+ pounds of dry ice
(8 pounds minimum for any quantity herb & about 12 to 14 pounds for4 oz. of herb, -40f is The ultimate target temperature, But as stated I use -50 /-60)
—Metal screen or grate To hold the dry ice above the herb & alcohol when in cooler, Why above ?
dry ice sublimation Co2 gas sinks it’s heavier when mixed with air!
So do you want that cold air falling over your jars… (I use grilling fish screen throw away type cheap metal flexible grates.
— silicone stir spatula
(silicone is your friend when dealing with cannabinoid oil’s)
— small glass storage jar
(I prefer the small Penzi spice type jars)
— plastic syringe for Vape cart filling (always wash syringe out with Everclear immediately when done, and save it drink it… it’s still good, makes a mighty powerful cocktail…!)
—C Cell type Vape carts
$4-5.50 ea.,
(4 -2 mm size oil absorption holes in cart)
—Vape adjustable PIN
(Vision Carbon Spinner 3
is cheap $8-12 ea.,
adj PIN to 3.7 Volts so carts don’t burn out)
&
((One last comment. If you did the above process at “”room temperature””,
Your yield would be about 6 1/2 to 7 1/2 g of oil per Oz. 30–35% more…
Why? You are picking up everything out of the plant cannabinoid oil’s, fats, waxes, chlorophyll, and other undesirables, which in all reality is just fine if you only plan on using it for edibles or gelatin capsules, but it clogs up Vape carts very easy & reduces potency.))
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Minus -50f Hash Oil Pic
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Hash (Keif) Yields about 68-70% oil, no wax/fat/biomass pickup if done at
very low sub zero (I prefer -60f using dry-ice in food cooler method) temperatures using
Ethanol (Ethanol extraction efficiency of about 95%)
((It should also be said that isopropyl alcohol contains more toxic substances than pure ethanol 190 proof
Everclear or “generic”Everclear (which actually shouldn’t contain any). Thus, we recommend to use isopropyl exclusively to clean your utensils and
glass pipes and not for performing extractions.))
Note: Ethanol is a polar liquid so it will pick up water soluble compounds such as chlorophyll, waxes, fats, cannabinoids, & terpenes.
If done properly, at (-40, I prefer -55) using dry ice Ethanol extraction can eliminate the need for winterization.
((Because ethanol has both polar and nonpolar parts (and therefore dissolves both hydrophilic and hydrophobic molecules), and it doesn’t require a high-pressure extraction, it’s considered (by most) to be the safest and most effective cannabis solvent in the game.))
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Fats, waxes are non polar
Ethanol can be both polar and non-polar, but overall is Polar.
Chlorophyll is Polar.
Because ethanol also picks up polar, or water-soluble compounds, it will draw out other compounds we don’t necessarily want like chlorophyll.
(((Cold extraction
Ethanol (Polar) solvent
( But has polar and nonpolar attributes a funny chemical)!
Cannabis cannabinoids & terpenes are mostly non-polar,
which means that they are extracted best by non-polar solvents. (Ethanol, however, is considered polar overall. )
So, although it can dissolve fats and oils, it will also interact with polar solutes.
Ethanol is an unusual solvent. What makes it unusual is it’s chemical structure; ethanol molecules feature both polar and non-polar regions, which gives ethanol the unique ability to both dissolve in water, but also do dissolve fats and oils. These qualities make ethanol a particularly strong solvent, which can dissolve a wide variety of substances.
Chlorophyll (polar)
is hydrophobic-meaning tending to repel or fail to mix with water.
fats, waxes, terpenes,
cannabinoid oil’s are all lipids… & non-polar
Chief among these unwanted plant materials are fats and waxes, commonly referred to as lipids. But the term lipids gets thrown around a lot in rosin circles, so what are they exactly? And why are lipids so undesirable in rosin? Let’s take a closer look at lipids: fats, waxes, and rosin.
What are Rosin Lipids?
Lipid is a broad term that covers a huge variety of substances, and it also has a fairly complicated
biochemical definition. But for the sake of simplicity, you can think of lipids as non-water soluble fats.
Basically, they’re
hydrophobic fats that don’t mix or dissolve well in water.
As mentioned, lipids include an enormous amount of different fats, waxes, and oils. In fact, almost all the cannabinoids in your rosin are lipids, THC and CDB included. Not to mention, terpenes are also a unique type of lipid, which means rosin is actually made almost entirely from lipids in one form or another. Therefore, it can be a little confusing when people refer to lipids, fats and waxes as unwanted elements in rosin.
Good article:
How to Find the Best Cannabis Extraction Solvents
by Anna Wilcox
July 19, 2020
