Glycerin Extraction

Kosher vegetable glycerin is an effective method for extracting cannabis concentrates directly from the plant material and produces a tasty medication that is easily ingested directly orally, or mixed with drinks and food.

Glycerin is a heavy, syrupy clear liquid sugar alcohol that has approximately 60% of the sweetness of sucrose, and about the same food value.

It is however not actually a true sugar and is often used as a sugar substitute, as diabetics are often able to use it without experienced the blood sugar rollercoaster they suffer with sucrose or other sugars.

Glycerin makes an extremely tasty and provocative cannabis tincture, that when made using cold extraction methods, is reminiscent of wild honey, as it preserves all the individual flavors, so that they dart off in all directions simultaneously.

Hot glycerin extraction also makes a tasty tincture, with the flavor more resembling a fine soup, where the individual flavors are married into one overall flavor. While not as whimsical and provocative as a cold extraction, it can be prepared start to finish in a couple days, where cold extractions take a minimum of 60 days and are commonly soaked for 120 days or longer.

Many of the provocative flavors and odors from cannabis are aromatic terpenes, and the reason that they are aromatic in the first place, is that they give off molecules at room temperature.

Heating speeds up the rate that the accompanying terpenoids and other aromatics are vaporized off, so many are collateral damage in a hot extraction and are lost.

The glycerin molecule is actually only a three carbon molecule chain, with three hydroxyl groups (OH) attached, and as hydroxyl groups are hydrophilic, glycerin is hygroscopic (absorbs water) and dissolves readily (miscible) in water.

It has a flash point of approximately 177C (351F), and a boiling point of 290 °C (554°F).

It is relatively non toxic. The MSDS tells us that the LD50 Oral rat dosage is 12,600 milligrams per kilogram of body weight, which is approximately 5.7 grams per pound of body weight, or 36 ounces for a 180 pound male.

By comparison, acute oral toxicity (LD50) Oral Rat for sucrose sugar is 29700 mg/kg and about 7060 mg/kg for ethyl (grain) alcohol.

At saturation, Glycerin only hold as 33% as much cannabis oil as the same volume of ethyl (grain) alcohol, so about three times more is required per dose.

To reach maximum saturation however, requires processing more than one batch of fresh material through the glycerin, because as the saturation level increases, the glycerin becomes less aggressive as a solvent and the partially dissolved cannabis boundary layer interface with the solvent is also no longer at full strength and as reactive.

To keep the reaction from slowing to a snails pace, or even stopping, some method must be used to keep removing this stagnant layer and refreshing the boundary between the solvent and resin.

In addition heat dramatically affects resin dissolution rates. The hotter it is, the faster it works, up to the point of overheating.

As glycerin is usually used as an oral med, we also need to consider decarboxylating the cannabinoids so that they are orally active.

If not in excess, some water solubles add to the flavor of a glycerin tincture, and taking all of the water out of the material before processing it, makes it frangible and prone to breaking into small fragments that may be hard to remove.

Let’s look at how these four variables can be manipulated to produce delicious and effective glycerin tinctures.

Drying and decarboxylation:

Plant material is typically dried to around 10/15% water content by weight for smoking and vaporizing purposes, which is low enough to make some delicious glycerin, but for those who prefer less water solubles in their glycerin tincture or wish to decarboxylate the material before extracting, you may add a drying and/or decarboxylation step.

To simply remove most of the remaining moisture, I place the plant material on a cookie sheet in a 200F oven and turn it, until it is frangible when I roll it between my finger and thumb.

At that point it is ready for extraction, but if you also wish to decarboxylate the plant material before making your tincture, you can then crank up the oven to 250F and after it stabilizes at the higher temperature, replace the plant material in the oven and hold it at temperature for approximately 30 minutes

That will add a roasted flavor to the tincture and many of the turpenoids will be lost, but it will decarboxylate approximately 70% of the existing carboxylic acids into their non acid orally active form.

An alternative to decarboxylating the material ahead of time, is to do it after the extraction is complete and the plant material has been filtered out. That eliminates the roasted flavor and preserves more of the turpennoids.

Using Temperature:

Elevating the temperature of the glycerin increases the rate of dissolution of the resins, especially if you raise the temperature high enough for the resins to be molten. THC, CBD and CBN are all molten at just under 180F, so we operate at that temperature.

The advantage of using as low a temperature as possible, is that fewer aromatic terpenoids are boiled off at that low a temperature, and it decarboxylates more slowly, so that the process doesn’t pass the peak of the decarboxylation curve and start down the other side toward low THC and high CBN. As previously noted, we can finish the decarboxylation later.

Keeping the boundary layer removed:

The boundary layer is the layer of partially reacted resin and dilute solvent that forms on the surface of the resin after the initial aggressive dissolution by the solvent. The solvent at that point is dilute, as is the resin concentration, so that the reaction slows or grinds to a halt.

To keep the reaction operating at a reasonable rate, we need to periodically or continuously remove that boundary layer, and there are four methods that I will present here.

The first is to stir. Simply stir gently and thoroughly with a wooden spoon

The second is to shake. Simply shake a jar of glycerin and plant material by hand regularly. A paint shaker would also work for this application.

The third is to tumble. Placing the jar of glycerin and plant material in a rock or photo film tumbler will keep the boundaries fresh. It is an effective and gentle way to speed up the process.

The forth is vibration. Placing jar of glycerin and plant material in a vibratory cartridge case cleaner, or other form of vibration, creates more shear energy that tumbling and will dissolve the material the fastest of any method we have tried thus far.

Material selection and preparation for hot or cold processing:

While glycerin tincture can be made from anything from prime bud to stems, it is tastiest done from prime bud and least tasty with the stems. I usually make glycerin tincture out of the sweet trim removed from the buds during manicuring and popcorn buds.

It is not necessary to grind up the material, only to break it up any buds so that the material is loose enough for the glycerin to reach all the surfaces. Excessive pulverization of the material will result in color and particulate pickup that is difficult to remove. If you leave some surfaces blinded however, the resins on those surfaces won’t be removed either.

Extracting using the cold process:

The cold process is the easiest and tastiest way to make glycerin tincture. We extract using the cold process, simply by soaking the plant material in glycerin at ambient temperatures and agitating it for sixty days or more. Sixty days is about the least amount of time for a cold extraction, and typically they are run 90 to over 120 days. I have one experiment with more than 365 days of soak time.

After the extended soak and agitation, the glycerin is poured off and pressed out of the plant material to yield quality and tasty tinctures. It can also be used with fresh material for another cycle, so as to build up more potency.

There are a number of ways to press out the glycerin from the plant material, and it applies to both cold and hot extraction, so I will cover that in a separate discussion at the end of extraction methods.

The way that we make cold process glycerin tincture, is to load a canning jar 2/3’ds full of plant material, lightly compacted and then cover with glycerin while stirring with a wooden spoon, until every surface is well coated and mixture is homogenous, and then add another inch of glycerin on top.

We place the jars in a cool dark place or cover to exclude light. We sometimes wrap jars with aluminum foil to exclude light.

Every day for the soak period days, we periodically agitate the jars, using one of the above methods and at the end I filter out the plant material for a a light golden to dark amber glycerin tincture, that is tasty and of high quality.

Because the aromatic terpenoids are preserved, it will have many flavors present, interacting and darting off in all directions simultaneously.

You can more easily filter the mixture if you warm it up to 150F or so before filtering.

Potency and gleaning:

As previously noted, to reach maximum saturation, requires processing more than one batch of fresh material through the glycerin, because as the saturation level increases, the glycerin becomes less aggressive as a solvent and the remaining partially dissolved cannabis is also no longer at full strength and as reactive.

In point of fact, the fresh pressed material from the above first cycle will still contain significant cannabinoids, which takes two to three cycles to get it all.

What we do is put the fresh pressed plant material back in the jar and refill with fresh glycerin and add fresh material to the freshly pressed glycerin for another cycle, if I desire more strength.

The fresh glycerin will do the best job of scavenging the remaining cannabinoids, and then can be used again with fresh material to further build up its potency. It is by this cascading technique, that we can leave little behind and yet still maintain quality and potency.

I should note that the most potent glycerin tincture is not necessarily the most tasty, and one cycle produces effective meds, so most of the time we do not bother to bump up the potency with cold tincture.

Hot glycerin extraction:

We prepare plant material and extract cannabis by the hot glycerin extraction process in much the same way as we do by the cold process, though we stir it instead of shaking, tumbling, or vibrating it.

We also use a thermal cycling process and stir regularly, rather than an extended cook as many processes call for. The expansion and contraction of the thermal cycling help break up the resins so that they dissolve more readily.

As with cold tincture, we load a canning jar 2/3’ds full of plant material, lightly compacted and then cover with glycerin while stirring with a wooden spoon, until every surface is well coated and mixture is homogenous, and then add another inch of glycerin on top.

We then set that jar in an electric fondue pot full of hot Canola oil at 200F, and stir it regularly with a wooden spoon until the mixture reaches 180F, and then we adjust the pot temperature controls to maintain 180F.

We stir the mixture regularly with a wooden spoon, for another thirty minutes, and then take it out of the hot oil and allow it to cool to ambient temperature.

For what it’s worth, we use a wooden spoon, because a light tink with a metal spoon against a hot glass jar while stirring, can break it and dump the whole mixture into the hot oil.

After the mixture has cooled to room temperature, we again place into 200F oil and bring it back up to 180F while stirring regularly. When it reaches 180F, after a through stir, we take it out of the hot oil and let it cool to ambient temperature again.

We repeat the last step about five more times and after the last cook and stir; we filter out the plant material while the mixture is still hot.

Filtering glycerin tincture:

Vegetable glycerin is thick and syrupy, so it doesn’t filter quickly or easily without mechanical help. The simplest way to filter it is to heat it up so that it isn’t so viscous, and pour it into a jelly bag, which you wring out by hand. That works, but leaves a lot of glycerin behind and you are limited to temperatures that you can handle with your hands.

A French coffee press, a potato ricer, or a jelly press can also work, and you can buy tincture presses used by the botanical extraction industry.

We made my own press, using a hydraulic bottle jack inside a scrap metal frame, which presses a filter bag between two stainless dog dishes, at a force of 12,000 psi, and catches the glycerin in a third stainless dog dish.

It presses the plant material into a hard little puck, that we have to break up to reprocess.

Flavoring glycerin tincture:

A well made glycerin tincture is a taste delight in its own right, but for those of ya’ll who just like to play, here is how we’ve flavored glycerin that I had already infused with cannabis oil.

We started by adding equal parts of Bing Cherry and Blueberry raisins in a blender with enough 190 proof grain alcohol to make a soupy paste when macerated by the blender.

We tossed in half as much Japanese Gari and a dash of Almond extract, added another half a cup of 190 proof, and let it blend well.

When pureed, we poured it into a stainless mixing cup and placed it in a 180F hot oil bath. We cooked and stirred it until all the alcohol was gone, and then removed it to cool.

We then put a bout two tablespoons of that concentrate into each 1/2 pint of infused glycerin to be flavored and place it in the 180F oil to cook for thirty minutes while stirring regularly.

At that point we remove it from the oil, filter out the concentrate using a filter bag and the glycerin press. The glycerin is delightfully flavored, and the chef gets to eat the concentrate from the filter bag! Ahwooooooooooooooooooooooooooooooo!!!!!!!!!! Hee, hee, hee………………..

Above

Hot soak for one week; Hot cycle 7 times;Cold vibrate; Hot cycle and vibrate

Cold Vibrate                                                                               Density samples

Second pressing of material                                                160F cycled 7 times

Cold press 60 days                                                                   Hot versus cold extraction

463 responses to this post.

  1. Ok that is what I thought. Thank you for your quick reply. One other question, is there anyway to tell if all of the cabinoids of have been extracted?

    Reply

    • 100% of the cannabinoids are in the trichomes. I judge when I have fully extracted material by looking for intact trichome heads under 100X magnification. When they’re gone, I’m done. Don’t worry about the stems, they will remain after the heads are gone.

      GW

      Reply

  2. Posted by Dlg on February 24, 2017 at 5:54 PM

    Regarding the hot method, you mention the cold method will fail to extract all the cabinoids from the plant and you need to repeat the method to get full potential strength. Is this the same for the hot method? Or does the thermal cycle take care of this?

    Reply

  3. Posted by Wendell on February 22, 2017 at 7:56 AM

    what about using only PG or a mixture of PG/VG?

    Reply

  4. Posted by Cody Hopkins on February 21, 2017 at 4:43 AM

    Thanks, it seems to be going well so far! I guess we won’t know until the final step. I love the website, I just came across it recently. Any good links on knowledge for a first time grow? Thanks again!

    Reply

  5. Posted by Cody Hopkins on February 17, 2017 at 6:41 AM

    I’m just trying this for the first time. I have steam heat in my house and I am storing it near my radiator. Do you expect this to be helpful, harmful or have no effect?

    Reply

  6. Posted by Alv on February 6, 2017 at 10:22 AM

    Pls don’t bother. It simply will not work. Everyone reading this should give up on both pg and vg. It simply is not potent enough so don’t waste your time. I know it’s a great idea but it’s only an idea. Someone should tell Ruffhouse to take down that video. It’s super misleading. Utter BS even! Someone should post on the original post about this and stop wasting time of others. I’m glad I did it so I know how futile it is. Don’t say I did not tell you beforehand!

    Reply

  7. Posted by Martha on February 4, 2017 at 5:00 PM

    You mention decarboxylating the extract after its made…how would one go about doing that.

    Reply

    • I infer that you are speaking of a Vegetable Glycerine extract. For cold extract purists/aficionados, storing it a year in a cool dark place will do the trick and preserve the wild honey flavors.

      If you are in a hurry, stick a stainless container of the VG tincture in a 250F oil bath and watch the bubbles. Keep stirred so you can tell what is going on and when the CO2 bubble generation falls off suddenly, you are at about 70% decarboxylation and when it stops, you are at 100% decarboxylation.

      VG flash point is 160C/320F and the boiling point is 290C/554F, so is unaffected at 121C/250F.

      GC

      Reply

      • Posted by Martha on February 6, 2017 at 9:47 AM

        Yes I’m referring to a VG tincture I made but forgot to decarboxylare the material prior to mixing it with the VG so I will try this method. Thanks

        Reply

  8. If i Wanted to use Cannabis oil instead of flower as my material. Would you recommend emulsifying the cannabis oil in ethanol alcohol and then adding it to the vg to make it mix in well? What would be your best way of going about making it with decarbed cannabis oil? Thanks

    Reply

  9. Defintely skip the EJmix or anything comparable. All garbage imo. Iv tried it all and using the one set of lungs we are given to test vaped plastic is not where its at. Flavrx makes a GSC cart that hits harder then anything Iv ever had. Its a terpene infused distillate that is highly effective after 1 low voltage (3.7) hit. Aside from that, dont waste countless grams of extract trying it at home unless you have an endless low cost supply.

    Reply

  10. The internet can be a powerful tool for furthing ones knowledge prior to asking questions.

    QWET- Quick Wash EThanol
    SCFE- Sub Critical Fluid Extraction
    CO2 – Carbon Dioxcide
    GW- The one and only graywolf OG!!!

    Reply

    • *Supercritical
      ROI- Return on investment.

      Isotoke

      Reply

      • Posted by Dale Robinson on January 11, 2017 at 10:31 AM

        Thank you very much. Wat would you say is the best way to make a potent thc e liquid?
        Thanks again

        Reply

        • Start with a pure extract in the form mentioned above and then add either an emulsifier like EjMix or get pure monoterpenes to reduce viscosity (make it thinner). EjMix does have something of a plastic taste especially if used at higher ratios than 1:1. Monoterpenes are expensive and will give your juice a citrus or pine flavor. There are products out there that use a mix of terpenes and claim to replicate well known strains. That’s the only way I know to get truly potent ejuice from cannabis

          Reply

    • SCFE could also be Super Critical Fluid Extraction.

      The world is probably isn’t ready for another Tattered Old Graywolf, but GW could also be GW Pharmaceutical!

      LD-50 Rat means 50% of the rats died at that dosage and PEL means Permitted Exposure Limit.

      TLV is Threshold Limit Value and OW means Oh Wow, with OMG meaning Oh My Gawd!

      GW

      Reply

  11. Posted by Dale Robinson on January 11, 2017 at 6:24 AM

    What do those abbreviations mean? Sotry if it’s a silly question I’m still trying to get to grips with all this.

    Reply

  12. Posted by Dale Robinson on January 9, 2017 at 6:00 AM

    So wat is it best to do e juice with alcohol??

    Reply

    • It can be made a number of different ways, some more expensive than others. A denatured QWET is a less expensive way to make one from ground zero, and probably SCFE CO2 the other end of the scale, requiring more volume to achieve an attractive ROI.

      GW

      Reply

      • Posted by Dale Robinson on January 11, 2017 at 6:25 AM

        What do these abbreviations means? Sorry if it’s a silly question just I’m still trying to get to grips with all this.

        Reply

  13. Posted by Dale Robinson on January 7, 2017 at 9:43 AM

    I’ve bought the mighty fast herbal infuser, anyone know if it’s any good I’m waiting for it to come and how to you make e liquid with it??

    Reply

    • I predict you won’t be happy with the results making e-juice. You can never approach the potency extracting with a non reducible solvent, that you mixing it with the solvent, because as the solvent becomes more saturated, it becomes less of a solvent and less able to dissolve more solute.

      GW

      GW

      Reply

      • Posted by Dale Robinson on January 9, 2017 at 5:47 AM

        Why wonthe I be happy with the results? Am I wasting my money buying this. I just want to be able to make the best possible e juice I can. What do you suggest??

        Reply

  14. Cannabinoid distillate is really the only potent vape juice. I’ve had some luck with using a little bit of PEG to keep a winterized extract separated then adding 150° VG and whipping it with my CAT scientific emulsifier. But then you have adding liquid plastic to your mix which I don’t trust, food grade or not. Terpene infused distillate is really the only pleasurable vape juice iv experienced thus far ie Flavrx GSC carts give great medication with 1 average hit with a great taste. Aside from that, I can’t honestly say what’s left as a viable method. Best of luck.

    Reply

  15. Did anyone manage to make potent ecig juice with VG? I don’t mean mixing VG and already extracted oil. I mean using VG as solvent like the above? I followed the Ruffhouse video and did not get anything potent enough. Or is it my tolerance? I even changed it up and only used the oil from first 2 washes. Still nothing significant.

    Any advice? I do not wish to use the RSO method because it will separate and is very messy with mixed with VG. My main goal is a potent vape liquid. Can anyone help?

    Reply

    • Not that I’m aware of. Even emulsifying VG and cannabis Absolute, we weren’t able to achieve a 50/50 blend.

      GW

      Reply

      • Posted by EstablishedPilot on January 26, 2017 at 11:29 PM

        Wanted to post because I noticed you’re relatively active in replying.
        I’m interested in making ejuice with VG and flower.

        What is the best approach? Making some kind of concentrate and then dissolving in VG, or do you recommend the RuffHouse video (which brought me here by the way) method?

        It seems like you are suggesting that trying to use VG as the solvent itself is not as viable. So would making something like a QWISO be effective?

        Reply

    • Actually, I prefer to not use VG/PG/PEG as a carrier solvent, because it is something else the lungs have to expectorate, and our Pharm D brain trust has reservations about the long term effects.

      I also have never had a e-juice hit remotely comparing to a dab off a nail, so either use a skillet instead of a cart, or use a cart of decarboxylated Absolute or Clear.

      Locally, Clear cart producers are adding monoterpenes for aroma and flavor, which also serves as a solvent to make the concentrate flow.

      GW

      Reply

    • Posted by andrew on February 6, 2017 at 2:59 AM

      yes – using this it’s easy as and supurb results – used vg/pg 50/50 mix from vape shop, 1 oz herbs, flavouring – https://magicalbutter.com/

      Reply

  16. Posted by Dale Robinson on January 5, 2017 at 10:28 AM

    Hi I’m looking to make my first ever batch of thc tincture 😆 can anyone help suggest what is the best method to start with? I’m new to all this and seen so much different information that’s it’s pickled my head haha 😂

    Reply

  17. Posted by Benito Cgognito on December 30, 2016 at 4:34 AM

    Hi =) Fantastic article so thank you. I came here via RuffHouse Studios youtube video, Cannabasics #29, which referenced your blog. My question is, if I intend to solely vaporize this VG tincture in an E-cig, is it necessary for me to decarboxylate the finished product (or the plant material prior) in order to activate the THC? Given that it is heated during vaping… Thanks in advance of your response. Benny

    Reply

    • It’s not necessary to decarboxylate, but you can’t make a very potent e-juice solution extracting with VG, because you’ll never get much higher than about 30%.

      E-juice is typically a mix of VG/PG/PEG and the concentrate is dissolved in it, instead of extracted with it.

      This article is oriented toward those taking glycerin extracts orally.

      GW

      Reply

  18. Posted by Craig Steffen on December 29, 2016 at 11:08 AM

    This is the Information we needed to confirm what we learned thru research and experience in the processing of this marvelous plant.

    Reply

  19. Posted by clover on December 27, 2016 at 3:03 PM

    Hello Skunk Pharm team,
    Firstly, this guide is extremely well-written with intricate, factual details. Spot on guys.
    I am very interested in using the Heat Extraction method. However, I can’t seem to find the specific ratios of material to use in this guideline (nor the comments but I didn’t look too hard, 410+ posts). So I went on a few websites to get some anectodal perspectives. So the following estimated numbers in this list may be wrong.
    Correct me if I’m wrong:
    – 1 Litre of Vegetable Glycerine
    – 1 Ounce of Medium-Quality Bud
    – 3 ml of Flavouring per 30 ml/Dropper Bottle

    …. Anything else I am missing?

    Other questions I had:
    1. To add flavouring, do we require proof grain alcohol? And even if we choose to not add flavouring, the VG and dry material is all that is mixed? I re-read the guide many times so if I missed anything that would be embarrassing lol.
    2. Can another alternative for heating be an electric heating table? (goo.gl/MGjaAe). I would think that the hot oil surrounding the jar of material and VG in the Crockpot would offer more points of thermal heating than the table. Pros for the table however, is that there would be no need for oil (saves $$) and it could fit more jars. But I’d rather do what is more successful, so what do you think?
    3. To confirm the thermal cycling process: After 30 minutes of stirring at 180F (82C), we take the jar out, let it cool to room temperature (say, 5-10 mins), and repeat 5 more times?
    4. To confirm the potency method: After the thermal cycling process and the first press has been completed, I put the material that was just pressed back in the jar, along with fresh glycerine and bud, and start cycling again? 6 times for thermal process again?

    This should cover it. Thank you so much and once again, great job on the post. Skunk Pharm has much of my respect. Take care.

    Reply

    • Posted by clover on December 27, 2016 at 3:15 PM

      Edit: I am planning on making many for my friends and family, so that is why I am using 1 litre/1 ounce ratios

      Reply

  20. I read somewhere that if you are making a cannabis glycerite to vape, you will need to add water. The ratio of water to glycerin should be around 1 to 3. Should I add the water at the completion of making the glycerite or before starting when I am first adding the glycerine with the cannabis? Thank you.

    Reply

  21. Posted by Brian on December 6, 2016 at 7:58 PM

    Hi,
    Great read. Do I still need to decarb the plant material if heated with the crockpot method?I’ve been vaping the glycerin in a little pen (the ones with the empty cartridges that you fill up) but is very weak. My ratios of plant material to VG is like you stated in the article.
    I would appreciate any help.

    Thanks again,

    Reply

  22. Posted by Raymond Ramirez on December 4, 2016 at 3:31 PM

    Greetings. Thank you for all the information you have given. I am using the cold method to make my marijuana glycerite. I will be letting it steep for 3 months or more agitating it daily. Upon completion you wrote:

    “An alternative to decarboxylating the material ahead of time, is to do it after
    the extraction is complete and the plant material has been filtered out.”

    After the 3 months, does this mean that I should filter the leaves out before decarboxylating and not while the leaves are in the glycerin/water mixture?

    Reply

    • Yes, filter it first!

      GW

      Reply

      • Posted by Raymond Ramirez on December 11, 2016 at 9:18 AM

        Thank you

        (1) If I wanted to make the initial batch stronger?
        When should I add the 2nd batch of fresh herb? Since I am planning for the batch to sit for 3 months as I agitate it daily, should I add the 2nd batch half way? Is 3 months long enough? I do understand the longer it steeps the better.

        (2) Also, the blog mentioned that when you process a 2nd batch, you filter out the plant material and take what’s left over and add it back to the jar with more glycerin and fresh dry herb. Do I decarb that first extraction before adding it back to the 2nd batch or am I waiting to the end to decarb everything?

        Thank you again

        Reply

        • The thing to keep in perspective in using “cascading” to maximize potency, is that a lot of usable concentrate is left behind, so the material is typically extracted multiple times.

          Except for the first extraction, all subsequent extractions would start with fresh glycerine and the plant material left over from the previous extraction.

          A really key point, is the question of how much agitation it got. Something that is regularly aggressively stirred, extracts faster than a fruit jar tumbler, so leaves less behind.

          Starting with pre-extracted material, I would first look at it under a 100X microscope to see how many trichome capitate heads were still available, and base my extraction time for that batch, on that.

          The tincture will eventually decarb itself as it ages, which is a technique used and aficionados swear by for best flavor. After a year aging, there is probably not much carboxylic acid left.

          Cooking the tincture at 250F to decarboxylate, dramatically changes the flavor, and baking the material to decarboxylate it ahead of time, drives off the monoterpenes, so time is our best friend when making fine vintage cannabis tinctures.

          GW

          Reply

          • Posted by Raymond Ramirez on December 12, 2016 at 7:23 AM

            Thank you so much! This was so helpful.

          • Posted by Raymond Ramirez on December 12, 2016 at 8:05 AM

            You mentioned: “A really key point, is the question of how much agitation it got. Something that is regularly aggressively stirred, extracts faster than a fruit jar tumbler, so leaves less behind.”

            By “aggressively stirring,” do you mean physically stirring with a spoon or something? My apologies for the simplicity of this question. I just want to be clear as possible and not start opening up my cannabis tincture everyday to stirr if that is not what you specifically meant. Thank you for all your help and that was my final question. 🙂

            I stir it thoroughly with a wooden spoon. Not hard so as to break things up, but more like you were mixing cement and blending everything together.

            GW

  23. Posted by Andy on November 30, 2016 at 8:49 PM

    Great read! If i Wanted to use Cannabis oil instead of flower as my material. Would you recommend emulsifying the cannabis oil in ethanol alcohol and then adding it to the vg to make it mix in well? What would be your best way of going about making it with decarbed cannabis oil? Thanks

    Reply

  24. Posted by Preston on November 25, 2016 at 12:27 PM

    Hello,

    Amazing information here – both in quality and quantity!

    I’ve been using tincture for a while now; starting to get into making my own. So far, just been using 190 Everclear. The drops under the tongue sting! Heh.

    So, I’ve been thinking about something to reduce that ethanol burn. I was thinking of mixing it with VG to reduce the proof to something like 80 or 90 and taking it just like that, but I don’t like the idea of having to take twice as much tincture to get the same dosage. Now I am thinking about mixing the 190 proof extract 1:1 with VG and then evaporating the ethanol off, leaving the good stuff behind. 🙂

    In your opinion would this work? I know the 190 ethanol boils off at 173F; any idea on a temp I should be shooting for when trying to evaporate the ethanol out of the VG mixture?

    Now, back to more reading…

    Thanks!!

    Reply

    • When the alcohol leaves, some of the solute in it falls out of solution in the VG.

      You can reduce the alcohol sting, by simply removing most of it. 50% concentrate in 50% 190 proof, cuts the alcohol potency in half.

      GW

      Reply

      • Posted by IJ500 on December 25, 2016 at 1:15 PM

        I made several batches of extract using VG almost 2 years ago, reusing the pressed leftovers each time. These leftovers have been sealed in a mason jar in a dark cabinet in a 70 degree cooled room and only opened a few times. Should this stuff still be safe to ingest? I got some great results from it last time I tried but that was 18 months ago.

        Reply

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