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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 about 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....................


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

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  1. emac757

    Shelf life is definitely limited. Iv had hot extracts that knocked your head of with 10 drops. Few weeks later, not so much. 2 months later, nada. Cannabinoid degradation is a study i would love tof read one day.

  2. emac757

    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.

  3. emac757

    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!!!

        1. ganjagrynch

          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

    1. Skunk Pharm Research,LLC

      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

  4. emac757

    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.

  5. How To Make Cannabis Tincture/ e-Cig Juice (Quick Vegetable Glycerin Method): Cannabasics #29 | My 4

    […] More reading: […]

    Reply       Edit
  6. Jamie Werner (@JNWII)

    If I were to do a VG tincture based on primo material, would it be less potent, as potent, or more potent than as if I were to vaporize or combust the same primo raw material?

    Reply       Edit
    1. sam prater

      Eating it is much more effective for pain and other things. Some of us are really sick and it helps a lot. Some folks are just getting high. i, personally, do not approve of the legalization of MJ for other than medical purposes!

      Reply       Edit
      1. Yum

        Prevention is better than the Pharma cure. Take it before you get sick. I personally do not approve of foolish legislation talk.

      2. T.J.

        When it's legal for recreation and medical, the medical uses will get it much cheaper and they will not be looked at as fakers. Why take an illness for a medication when the medication is legal over the counter? So, as a potential medical user in an area where it's illegal for both medical and recreation, I say - who cares if stoners get it to? Don't be so judgemental. Also a plus - people are less likely to be drinks when they are also stoners, so we will be less likely killed in dui accidents. When it's legal for recreation in more areas, (it will be more acceptable) strict states like the biblebelts will be more lenient for medical use.

    1. jimc2350cofarmer

      I have done exactly that the some Mexican pot. Turned out pretty good. It was a little on the sedative side.The glycerin is tasty as well. I used 40-50 gms ended upA pint plus of glycerin and 90 days shaking etc.

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  7. Gregory

    all you do is fill a jar with herb fill it to the top with glycerin close at ceiling it in a mason jar keep all light away" black bag "from it for 60 days shake it daily and that's it that your tincture and then all you do is press the herb through cheesecloth and get the tincture out of the herb and its yummy.on your aching body parts and also underneath your tongue for as long as you can keep it there.

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  8. Dave Arnold

    Great site. Always my 'go to' whenever I start any science project. Question: I have two quarts of glycerin that are about 9 months old. It wasn't made to your specs and could be made stronger, since I have this summers crop sitting in jars getting older by the day. Should I start fresh with new glycerine or can I build on the older batches? Either way is fine. I do like the glycerine tincture in my closet of oils and subs. Thanks for the great work. Dave

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  9. John

    Hi, first of all thank you for taking the time to share this information. Quick question though. I recently did an extraction (thermal cycling) and when I proceeded to the decarboxylating stage the extraction never started bubbling, I had it in a jar in a pot with water on a stove/hot plate. I assume it was at correct temp. Water was hot, but not quite boiling at the beginning, towards the end it was slightly boiling and on the last cycle it was boiling. I was going by the look of the extraction itself during the entire process, which was definitely hot and runny the whole time. It turned dark pretty quick and was black at the end. One thing I forgot to mention is I used 3G vaped and 1g normal (dried) that is why I tried to decarb it to get the last out of the vaped and all of the dried. Sorry for the rant, figured I would provide as much info as possible. Hope to hear back from you. Merry Christmas.

    Reply       Edit
    1. Zombie_WeeD

      asuming i understand you correctly you used weed you had vaporized already if so ... quality of starting material decides quality of output material. so your vaped leftovers are not a good starting point. Yes they may contain some residuals but most of the thc is gone if you have a good vaporizer. I have a Pax vaporizer and ill vape on its highest setting till the bud turns a brown/almost blackish color and crumbles to the touch. The leftovers are virtualy worthless i will (rarely) mix it with tobacco to give my cigerette a nice earthy flavor but beyond that i cant imagine using the crumbs leftover.

      Reply       Edit
  10. tinct-tinckering

    Can you please explain decarboxilation in the last step of the hot process. Temp and time. I've been following this thread for a long time now just being audience. Thanks for all your information and time. I think this is overall healthier and enjoyable way of medicating.

    Reply       Edit
  11. korupt

    Experimenting some more so now I'm back thirsting for knowledge:) Vibration seems to be the best thing but would an ultrasonic cleaner work at all? I know it is not exactly the same type of vibration but maybe sound waves can be used to keep boundary layers from forming and help free cannabinoids. Any thoughts on this? Is it always best to agitate more or is there some point where it isn't required any more? I saw that with vibration you used like 10h/week, I got a dremel that turns on every 15 mins and rests for 45. Could agitating to much damage it somehow? And my last question is on decarbing. I asked this before but I wanted to check if I understood it right. After I followed the hot process and let it sit for 2-3 weeks, right before I am to bottle my tincture, could I decarb it here? The small tests that I've made with VG seems to indicate that I can, as I am able to see the bubbles forming but I'm not sure if there is any disadvantages to this. Thanks for the help everyone.

    Reply       Edit
    1. skunkpharmresearch

      Any energy wave that creates an interchange of solvent at the resin interface, would help. I guess it would depend on the sound amplitude and frequency. The agitation has to be gentle enough to not break up the material. Yes, you can decarb as a last step.

  12. Mark Miller

    I have been reading this stuff all morning. I am trying to perfect my oil. I am using pure bubble and VG to make it,getting it to around 180f and the hot and cold method.But when all is said and done the is a left over that has not melted down. What do you think it is? is it still what I want or is it a by product.It still smell great... Can that be melted at a higher temp.Or should I just get rid of it ? Perhaps it needs to cook for a longer period. Thought I read somewhere in here to cook for 6hrs the first day then 4 the next and 4the next........ Could really use some help here.....

    Reply       Edit
    1. skunkpharmresearch

      Vegetable glycerin isn't all that good a solvent, so some of it is good stuff that wouldn't dissolve and some is the cellulose material left over from the trichome stalks and discs. Straight BHO won't readily dissolve in VG either.

      1. Mark Miller

        Thanks for the reply I am trying to stay away from PG that is why just VG to melt , I know you folks say 180f is less better if you are not in a hurry ? Is PG a better solvoent? If so Ill use it for the last run. Or do you have a better idea? What do you think about vacuming the jar while heating? I have tried BHO but think it taste very bad. What I am getting now taste very good, nice light brown sugar color and can be smoke in a E-Cig Used some bubble from last yr and not nearly as nice as the fresh stuff a week old. So I would use only the freshest product you have. Will send pics if you folks like.

          1. Mark

            Happy New Year GW Using the above mentioned method I have come out with what I think is really nice, smokes good and taste great. But the THC level is very low. For you see I had it tested. I am thinking to much oil not enough bubble. So I am going to do some more bubble runs and try to make it as strong as I can. Should have at least 250-300 more grams to ad to it. I am trying to get away from smoking the greenery in the plant it self. And I have been smoking for 41yrs so my tolerance is very high.... my question is this: Will pure grain alcohol melt the bubble? If so will it mix with the VG to make what I have stronger? Would you just do it in the old oil? I am trying to stay away from the heat mehod, that is why I want to try grain alcohol that way I can use less liquid to melt it down. As to not turn THC into CBN Also do I need to decab it, It only went to 180f or less for the transfer. I dont eat it I smoke it. So is that something that needs to be done?

          2. Johnny Golucky

            First and foremost, thank you for all your research and willingness to share this information. This website is a wealth of knowledge. Do you have any recommendations for incorporating BHO into VG for e-cig cartridges? Is it possible to do extended cold processing with BHO in VG on a tumbler over long periods as you do with the cold extractions for fresh material? Or will BHO just never dissolve into the VG, regardless of how long it sits? If my intent is to get e-cig cartridges with VG-based tincture. Would you recommend just doing the cold extraction on fresh material as listed above vs. trying to go to BHO first? Any suggestions would be greatly appreciated.

          3. Johnny Golucky

            You can delete my previous message. I will admit, I didn't read the entire thread - now I have and now I know the answer to this question as I have had the same results you have posted here - just wanted to confirm I wasn't a dummy! :) Thank you GW for all your continued work.

  13. Pete B

    I plan on using 7.5g of very high grade material with a 2oz 50/50 mix of PG and VG, I am going to decarb the material then mix into the 50/50 mix. Once mixed I plan on putting it into a sealed jar and putting it into a crock pot. I am undecided on using oil or water in the crock pot. How long should the jar sit in the crock pot,? Should I just put on warm, low or high setting? I am then going to filter through a cheese cloth and vape the oil in a vape pen. Does this sound correct. Any advice you can offer with the crock pot would be very helpful. Thanks

    Reply       Edit
    1. skunkpharmresearch

      You need to stir the material frequently and thoroughly to keep the dissolution going. Water is hot enough, but I like to use hot oil because PG and VG will absorb water from the steam while you are stirring it. I would extract closer to 140/150F to keep the THC to CBN conversion low. Never tried a 50/50 mixture, so no idea on time. If you have a 100X microscope, you can tell by looking at the trichome heads.

    2. Jeff F

      Hey Pete B..... How did it work out buddy? I plan on using just plane VG for extracting and using PG to blend with the finished product.... I'm curious to know how it worked for ya tho? Let me know.

      Reply       Edit
      1. rh0k

        Hi Jeff.. I've got the same question for you. Its been over a year so im thinking you went ahead and tried it. How did diluting the finished vg tincture work? Im torn between pure vg and a 50/50 mix for my extraction

  14. Steve G

    Possible Solution for dissolving BHO in Glycerin! Hi GW, I was speaking with Joe on Friday and he told me about the lack of success everyone is having mixing BHO in Glycerin, BHO not being soluble in Glycerin. I may have an solution; we also manufacture homogenizers, handheld and bench top. Gas and oil companies use our homogenizers to make oil /water emulsions, via dispersion. Here’s a demonstration of our X120 handheld homogenizer: If you think this will work let me know. Steve

    Reply       Edit
    1. Alfonse

      at the end of this video, there is a very noticeable top layer that is a different color from the rest, did the oil already begin to separate that quickly?

      Reply       Edit
  15. Wired

    Hi! I recently attempted this, but forgot to decarboxylation and I feel like the result is not so potent. Is decarboxylation really going to be about 5 times more potent? I have to do this but this website - They posted results on research of decarboxylation and indicate that on kief the THC level were moving from 4% to 25%. Is that the solution? I'm also wondering could I use Volcano vaporized product to use in the tincture and consider it's been decarboxylated ? One last question, you refer to re process the material, when you say that you mean the plant material, not the extract? is it possible or recomended to re-use a tincture against new buds to improve it's potency or is that almost useless? Let me know! thanks for the post I love how well the concept is explained! Thanks

    Reply       Edit
    1. skunkpharmresearch

      What decarboxylation does, is simply convert the THCA carboxylic acid form of THC into its phenol form. It does that by removing the COOH carboxyl group in the form of C02 and water vapor, but doesn't create the THC, on changes its form. Vaporizing decarboxylates on the spot, and most of what is left in the volcano remains, are the heavier cannabinoids, with the higher boiling points. THC is actually one of the lowest.

      1. psamson6

        So what does it mean about the volcano remains? Their THC level are low so transferring them into a tincture will never make it potent? I ask because I can make about 5 bags filled with visible vapor. If I used product that I made only 1 bag, was it long enough to transform the THCA state and will there be still THC to worth a tincture?

  16. Gloria Corke

    At what temp and for how long would you decarb a finished product ,had it not been previously decarb’d and is it better to do in a double boiler or just on the stove with a themometer? Someone else made the tincture for me and said it had to be decarbed, this is the first time I am doing it so I am a little confused on how to do it.

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  17. John Bull

    Hello again Do you have any wonderful ideas about what to do with the glycerined plant remains (apart from continuing to cycle them/sprinkle it on cereal)? I've found them still quite potent. Would making a butter extract more THC than what the glycerine has/hasn't achieved? Or, I don't suppose there is any wash that could be done? I'm presuming any oil produced, from say an ethanol wash, would be nigh on impossible to separate from the glycerine... I'll get my spoon.

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  18. Mike

    I am currently making my first tincture with 1/3 cup of veg glycerin 10gs of vaped weed and 1 of fresh I have had in a crock pot for about 2 days and haven't done any cycling but have stirred it quite a bit. It was brown origanlly but now is very dark black should I try to cycle it still leave it on for another day or just take it off

    Reply       Edit
    1. rh0k

      This has been by far the most informative thread I have read in 6 months of careful planning. Now im all set to make a 50/50 vg / pg tincture I have a couple questions regarding potency. First off - am I to understand that if I complete a tincture then add fresh bud It will increase potency or is the vgpg already at max saturation? Secondly - when saturating the bud in fresh vgpg for the second time should I reduce the quantity of vgpg because the bud has already been partially extracted? Finally - is there any point filtering my solution before adding fresh bud (first answer pending) or cant I just filter all my solution once the process is complete? Any help from those who've tried it will be appreciated. For context I intend to: decarb > warm water bath for half day > cold extract for min 4 months. Ill get a rotation going midway (depending on answers) to include fresh bud and solution. Thanks all

      Reply       Edit
  19. Rezman

    Hi, Thanks for this great info! I was wondering what is more potent, the hot or cold method? I have heard that a hot extraction loses potency over time (as little as 2 weeks) but a cold extract gains potency with time is this true? I have also heard that adding pure orange oil can increase thc potency? Would you recommend maybe adding some drops of orange oil? I just started two weeks ago with a cold extraction, but I dont think I want to wait another 4-6 weeks, especially if a hot extraction is more potent. Would I mess it up if I took whats been there for a few weeks soaking in glycerin and did a hot extract? Thanks!

    Reply       Edit
      1. Rezman

        Not OJ, but D-Limonene is actually what I hear to combine with a tincture/extract to increase potency. Orange oil is 90% D-Limonene. TetraLabs makes their PureGold with 5% d-limonene, so I figure a few drops of Organic orange oil may increase potency and add a nice flavor? Does something with the terpenes. I haven't done extensive research on this so let me know what you think...may be beneficial to this recipe.

  20. Rob

    "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." first, thank you for all of the info on your site...just wonderful second, can you please cover how to decarb after filtering out the plant matter? im not sure if i can get it hot enough in the oil bath, or what time/temp i'm shooting for here...or do i stick the jar of filtered glycerin in the oven @ 250 for half hour?

    Reply       Edit
    1. skunkpharmresearch

      You can decarb after extraction by putting the filtered glycerin in a 250F hot Canola oil bath and watch the bubble formation. When C02 bubble production suddenly drops off, you are at about 70% and when it stops completely, you are 100% decarboxylated.

  21. Brooke

    Hi there! I have been working with my chemist friend on trying to come up with a healthy and clean smoke to put into e pen and also for dabs we have done hexane, glycerin, bho and ethanol but are having a hard time finding the right consistency for the mix that tastes right. I have read glycerin tincture can be mixed down to the right dilution fairly easy but we now how to make great hexane and ethanol extracts already. Trying to brake away from bho. Do you have any advice? Your page is really nice by the way!

    Reply       Edit
      1. Brooke

        So we have been making the hexane honey oil and then trying to add alcohol, glycerin and PG to get the right consistency for epens. The hexane wash seems like a purer way to extract large quantities. But we are having problems with adding the PG/ VG combining at the end between flavor and consistency. DO you recommend these additives for a good smoke or just diluting with alcohol?Alcohol seems to burn quickly and not produce enough bulk? Thanks!

        1. skunkpharmresearch

          I haven't had any success with VG blending. I never tried any of the other glycols so I dont have any experience to speak from.I found just thinning a little with ethanol worked in keeping a high concentration at a workable consistency. The viscosity needed to work good in pens varies by brand and model. Its also quicker and easier than blending with other liquids. Just from personal experience.

          1. MyxedUpMike

            So you thin wax(s) with the ethanol? I'm trying to figure how to utilize thicker bho in a tank style (wick to element) ecig and believe this is what you're referring to..? Great site!! I absolutely love it and it has exponential improved my weed geek!

      1. Stephen

        yea i vac purge my oil, but i was seeing instead of throwing all my herb away after iv ran it, is there any other uses for it?

        1. skunkpharmresearch

          Depends on how effectively you remove the oil with the butane. We typically don't re-run material that we've extracted using butane, because we've pretty much gotten it all. You can examine your material with a microscope, and if you have many intact heads, it might be worthwhile. Ignore the stems and hairs, as they are left behind after extraction.

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