I think most people dabbing BHO take way too much. If you figure an extraction rate of 15%, if you smoke a 0.1g dab you just had smoked all the resin from 0.6g of plant material.
I think his point is moderation is the key. He's a prime example of too much of a good thing being bad.
Also marzfisch forum name should be Learning to Troll.
Your concern is very appreciated. To whom are you directing these comments? Fadedawg is using closed loop system where butane is not exposed to the atmosphere and Saybian's choice of solvent is d-limonene.
How do you modulate the pressure to keep the vacuum stable at -29.5"? I have heard of some people leaving a valve on their vac ovens open a just a crack and getting more flavorful results, but I don't imagine that is a good long term course of action for your pump.
Here is one example of a recent "hash lab" explosion that left the operator in very bad condition. http://abclocal.go.com/kabc/story?section=news/local/orange_county&id=9314852
My guess is that he knew of the flammable nature of butane but did not take into account that a spark could be caused...
Some very interesting stuff in here Finshaggy. Seeing as nobody knows definitively how or why cannabis (and its constituent components) does what it does, your research is a step in the right direction! I am excited to see your plans unfold and hope you can make some amazing discoveries :)
You want to minimize the presence of water in the extraction or you will pull undesirable stuff like chlorophyll. This is why some people pop their material in a dehydrator before blasting it. This is also why others freeze their material (to keep water in its solid form). You could dehydrate...
I saw the video on youtube of a guy using car oil filter to make a ghetto filter for vacuum pump. I don't agree in his evaluation of the efficacy on his homemade contraption, it is only shielding the area from oil splattering out, but doing barely anything to actually filter the mist. I know...
IME high would be above 80%. Winterized should be at least 70%, but someone please correct me if you have more accurate info. This is based off my knowledge of what I see in CA dispensaries.
If you are dabbing recreationally you probably do not want CBD as it is known to antagonize the effect...