I'm not sure how much truth there is in the 'heating thc' thing, heating it too much could degrade or vaporise it. You don't need much heat, if any at all, it probably happens in the drying process. As long as the plants were mature when harvested that process could have happened on the plant.
THCa seems to possibly have some benefits too, maybe it's easier to absorb orally & active too, I'm not sure if many people know, since its so unstable.
Eating plain raw hash works, tastes good too as long as it's good hash (it's a good way to quickly assess the quality of hash without getting too wreaked too, just put a crumb on your tongue), but it's not as strong, you're wasting some because it's hard to absorb.
Hash yoghurt always worked great for me, I'd just heat some crumbled hash & oil or butter mixture (usually on a spoon), but only use just enough heat for the hash to dissolve, then mix it into a yoghurt, always works. Works a lot better than just eating hash on it's own, or any other kind of edible I've tried, but I think it just makes it easier to absorb because it's mixed with milk & fat, it can be part of an emulsion.
SWIM: expecting all hash to be 50-80% THC is wildly optimistic, that's the best of the best hash, real top quality stuff that melts & boils quickly if it goes near a flame, top of the menu in the best Amsterdam coffeeshop stuff sometimes gets to 50-60%. Extracted oil/wax/jelly, homemade ice-hash or absolutely legendary traditional hash like temple ball or caramellos are the only ones that get above 50%. Most 'good hash' is more like 20-30%. If smoking that amount in one go doesn't floor you, then why would eating it? It's easy to build a tolerance. I ate a gram of some top quality morrocan hash, on my way back from Amsterdam, I'd estimate it was 40%+, it was fresh 'full-melt' quality dry hash, 'Tornado', that worked & got me really nicely stoned, but I'd guess it was only half the effect I'd get from smoking it or putting it in a yoghurt (which would've been far too intense for an enjoyable plane journey).
I guess somebody needs to dissolve some fresh ice hash in cold vodka or something, test it out. It's possible to make good ice hash from fresh wet leaves & you're making the hash in ice water. You'll need to be really careful & quick though.
I just found some data from a proper research chemical supplier (no, you can't get it, proper scientific place), who sell pure THCa, here is their data on it...
- Appearance: Slightly colored ethanolic solution
- Solubility: Soluble in methanol and ethanol
- Stability: Δ9-THCA is very unstable, decomposing rapidly in the presence of oxygen, light and acids. It is stable for 3 months at -20°C, 2 weeks at 5°C, and 4 days at room temperature (Zoller et. al. 2000). Δ9-THCA powder appears to be more stable but stability is indeterminate at this time.
- Storage: -20°C
- Shipping: On ice (5°C)
- Handling: Avoid exposure to oxygen, acids and direct sunlight.