Salutations,
While i'm waiting for dame nature to do her thing i've just finished an "alternate-source" sample which caused me to cough severely, especially at the begining of a session around 185 °C (365 °F). Everything failed at 1st - including fog-conditioning - but as i climbed the temperature scale i noticed the last few inhalations near 200 °C (392 °F) weren't that bad and yet those felt satisfying. Perhaps someone who coughs a lot and lives with other vaporists could try to vape last and see what happens?... Though i thought harder hits usually occured at high temperature, i simply wonder.
It is most likely due to the essential oils effecting the cilia, and the lungs. As you went up in temperature there were less of these oils being released, so less irritation, or lung dilation. THC, is tasteless so it doesn't effect the lungs as much as the essential oils. This is one of the reasons why concentrates can feel so hard on the lungs, they are high in essential oils, which when taken in too high of a concentration in the lungs can cause irritation, and effect the lungs. Moisture plays a part also, but it isn't the only reason people get lung irritation from smelly, potent buds.
I think the reason why people who vape or smoke a lot don't continue to get the irritation as someone who has just started vaping/smoking, is because the person who vapes/smokes all the time have less active cilia then someone who doesn't due to the thick vapor/smoke bogging down the receptors for bitter compounds on the cilia, especially if they take in thick vapor or smoke, so the newcomer will cough way more then the experienced person who takes in thick vapor/smoke.
The best technique to avoid this is to use very little in the session, and just add more herb when you want a good taste as you go up in temperature, and the herb tastes bad.
BTW, I don't think the essential oils are a bad thing when used in a small dose. In fact I think they will enhance your lungs by keeping the cilia active, which in the long run will make your lungs more stronger, as long as you eat the right foods to repair them. They will also help more cannabinoids be absorbed as they help the lungs dilate more then they usually are, which means more blood being in the lungs to allow more cannabinoid absorption which is why starting at a low temperature then raising it in increments is best. You are essentially preparing your lungs to absorb as much cannabinoids as possible by allowing the essential oils to help clean out the lungs of dust by activating the cilia. As well as bring more blood to the lungs with dilation of the smooth muscles in the lungs.
Check this out.
http://www.usnews.com/science/articles/2010/10/25/bitter-lungs
"Liggett said he expected the bitter-taste receptors in the lungs to produce a "fight or flight" reaction, causing chest tightness and coughing so people would leave the toxic environment.
"But that's not what we found," Liggett said.
Instead, when scientists tested some nontoxic bitter compounds on mice and on human airways in the laboratory, the airways relaxed and opened more widely.
The compounds "all opened the airway more profoundly than any known drug that we have for treatment of
asthma or
chronic obstructive pulmonary disease," Liggett said."
http://www.sciencedaily.com/releases/2009/07/090724144530.htm
The study is the first to show that motile cilia on airway cells not only have this "clearing" function, but also use the receptors to play a sensory role. The researchers also found that when the receptors detect bitter compounds, the cilia beat faster, suggesting that the sensing and the motion capabilities of these cellular structures are linked."
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then i thought when i wrote it!
)
