@fangorn Very interesting reports!
The "whole nug" technique of achieving longer sessions is essentially the exact opposite of my current vaporizing technique, so it's great to see that the Toad is versatile enough to handle different situations.
@KeroZen and I are on the same team is seems, haha.
The whole nug experience is pretty neat because it seems to give you a slow release session...where you can stretch it out over many hits. I can totally see the appeal of this.
But, If anyone is interested in playing around a bit more, there is a technique that I think gives the flavor benefits of whole nug loading, without the uneven extraction....
This is a one or two hit and done method... so it won't appeal to everyone, but here it is anyhow.
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Last year I made a test rig that holds a Toad/Nomad heater and glass stem in a way that allows me to view (through the glass) the flower in the chamber as it's being vaporized in real time.
I've been playing around a lot with this setup over the last months to see if I can improve on anything, and I've definitely got some insights into what's going on with this specific heater/chamber that's in the Toad/Nomads.
I've been into the idea of targeting the heat application on the trichomes. Instead of thinking about extracting the whole plant, I have been focusing on the trichomes, leaving the plant material as untouched by heat as possible. This has been an ongoing project for a while.
Keep in mind this is all personal preference and a work in progress. I've talked about this stuff before... but I think it's evolved a bit since then, so maybe time for a refresh here...
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For this technique to work, most important part is the prep work.
Lets take a look at some plant anatomy to understand why that's important.
The cannabis flower is mostly made up of a bunch of bracts covered in trichomes.
These bracts differ from strain to strain, but are generally fairly similar. Sometimes I find them to be very tightly formed, with a few layers (like an onion), and sometimes they are less dense. Sometimes they have an immature seed inside, sometimes not.
The main thing that I try to do when I'm breaking up cannabis flower is to keep the bracts intact and untouched. This helps to keep all those trichomes intact and attached to their stalks.
My theory as to why whole nug vaping usually results in better flavor is that you have the least amount of handling going on with the nug, and so the trichomes on the surface of the nug are still intact. The downside, in my view, is that you have a LOT of hidden trichomes.
In the above image, note the "Bracteoles". These are the layers of plant material that make up the bract (again, like an onion).
My goal is to end up with a chamber filled with individual bracteoles that are as intact as possible.
This requires first breaking the bracts from the stem, and then separating the bracts into bracteoles. This is obviously an issue, since it must be done by hand. I use two toothpicks to do this. Most people likely won't be interested in going this far, I totally get it, hahah.
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As I observe the vaporization process in my testing rig, I've noticed that it seems possible to flash vaporize the trichomes if the temperature is high enough and the duration of heat application is short.
I think of it like this..... Imagine trying to vaporize the hairs on your arm. With a blowtorch you could very quickly run the flame across your arm and vaporize off all your hair without burning your skin. But if you tried to do the same with a lower temp heat gun, you would need to leave the heat on your arm for a longer time before the hairs started to vaporize, burning your skin in the process.
I imagine the trichomes are like the hairs on your arm, and your skin is the plant material.
I suspect that if you expose the bracteoles to a high enough heat, for a short amount of time, you could vaporize the surface trichomes while leaving the plant material mostly unscathed.
In practice this is much more difficult than the arm hair analogy... and that's because the trichomes and the plant material are much closer in mass compared to the the hair/arm scenario. There is a much smaller window for success.
This is why I think it all comes down to loading technique, the stage must be set perfectly. Without the perfect setup you really have no chance at all.
For a trichome to be vaporized before the plant material, it needs to be elevated from the plant surface by the stalk. Any trichomes touching the plant material directly are less likely to be vaporized.
There is also the questions of melting. If you observe the trichomes closely as they are being vaporized, you can pretty clearly see that with a low heat extraction the trichomes actually melt and wick down the stalks. But, you can also see that with high heat the trichomes seem to turn instantly into vapor, skipping the melting stage. I think this needs further looking into, but those are my observations.... who knows if there is something else going on that I can't see.
The bracteoles, being flat and roughly tortilla chip shaped, have thin edges. These thin parts of the plant structure are the first to be scorched by the heat. Careful loading can minimize this.
It seems unlikely that the plant matter won't be at least a little bit affected by the heat, I'm not expecting perfect, I just try my best.
This technique gets easier the less plant material you use. You really want to use a single layer of material in the chamber for the most perfect results.... but with a small chamber this really limits the actual size of hit you'll get. So I think this method is only suitable for microdosing or sessions where you don't mind loading the chamber more than once.
I aim to extract in one or two hits.
Fluffy pack is the way. You want as much air space around the bracteoles as possible, BUT, never so loose as to have plant material blow around the chamber due to airflow. This is a balancing act.
Anyhow, that's just some nerdy ramblings on what I'm into these days... not sure if it'll go anywhere, but maybe it'll inspire some further experiments beyond whole nug loading.