WatTyler
Revolting Peasant
I'm not so sure on this bit. I think it also heavily depends on the ration of THCA:THC. Of course, as you say OF, the other 40% odd constituent of the BHO is not insignificant. However, I've read that THCA is hard crystalline structure, whereas THC is a viscous consistency. As I'm sure some know THCA decarbed = THC, and so once subject to sufficient heat and fully decarbed (all THC) the oil no longer sets hard.My thought is THC is THC, so that part can't be the difference. It has to be in the 40% or so 'other stuff' in the concentrate. Waxes (more common with BHO?) should make it thicker, water, plant oils, chlorophyll and the like make it thinner?
OF
This would also be why oil from older bud is sometimes softer as more of the THCA has decarbed naturally, whereas the fresh stuff contains more THCA and so has a harder shatter consistency. So I've read. I've limited experience of this myself, but it fits in with that limited experiences.
So this understanding, which I don't claim to be correct, led me to query decarbing the oil first before loading in the cartridge in my earlier post. Unless I'm mistaken in my thinking decarbing before loading might be a beneficial. I'm also thinking that, as well as the hardness issue, as the oil heats and decarbs it bubbles away that extra CO2 (as well as those poor terps) and this bubbling must contribute to some degree to the poor feeding down to the bottom of the first chamber.....? Flat, inactive, viscous decarbed oil would be better. Does anyone more knowledgeable than I concur?