If you have a refrigerator with a freezer section, dry ice is probably overkill - but for a single jar test run, 10kg should be more than enough...as long as you contain it all in a decent cooler; by the same token, a home freezer should be more than enough, too. The dry ice will freeze it harder, faster, but I’ve used my refrigerator freezer with good results multiple times - and is why I recommend freezing 24 hours, or *at least* overnight.
It is true that 99% isopropyl is “better” than 96% ethanol- but in practice, that’s not a meaningful difference, especially if you factor in the toxicity of iso and the resulting need to evaporate it *fully*. I have worked with both, can can say with confidence that ethanol in the 96% range not only doesn’t *require* the massive extension of working period you suggest, but so long a soak time as even TEN minutes will grab plenty of chlorophyll and other water solutes - essentially injuring your results. Ethanol is also simply safer to work with if you’re working from ideas and estimates.
Here’s a detailed sequence I recommend: I don’t pretend it’s “perfect”, or “best”, but it will give you decent results if you follow it closely.
- once you’ve done your freeze, prepare a non-heat-conductive surface;
- prepare a jar larger than your freezing jar (half-liter/liter, for example), stick a coffee filter down in it part way, fold over the top part & secure the filter to the jar with a rubber band (Melita filters work fine);
- put insulating gloves on (not thick or stiff, just want to keep the cold jar and your warm hands separate);
- remove the alcohol and weed containers to your protected surface, & quickly remove the cap and lid;
- IMMEDIATELY pour cold alcohol on the cold weed - fill it half-way - screw on the lid, shake it vigorously 10 seconds;
- IMMEDIATELY put weed jar back in the freezer for 3 minutes (bury it in ice, if you can);
- put the alcohol back in the freezer, too;
- remove weed jar, shake vigorously 10sec, replace it in the freezer as before, this time for 5 minutes;
- Remove, shake, remove the lid, pour the weed and alcohol into the filter (slowly, don’t overrun the filter capacity);
- if you wish, once the filter s emptied of alcohol, pour a little more alcohol into the filter to collect anything left in the paper.
The end. Now you have the larger jar with all the honey-containing alcohol in it. Let it come to room temperature before doing anything else. Once that’s done, you can let the alcohol evaporate naturally, or you can expose it to gentle (gentle!) heat to speed the reduction. Once it’s reduced enough, a silicon muffin pan can be used to evaporate the rest...which will make it easier to remove the honey.
You can leave it with a little alcohol & use it as a tincture - but ONLY if you’re using ethanol, not isopropyl. Personally, I like to dissolve it in butter: it tastes great (to me) by itself, you can put it on toast, or use it in any way you’d use butter. If you’d rather smoke it, mix some fresh ground herb into it until it becomes a workable paste, which you can apply to a pipeful. “Fresh ground herb” means herb you *didn't* extract.
Keep it simple, and you’ll learn a lot *and* have product you can use as you wish.
I strongly advise you run through the entire process “dry“ - no alcohol, no weed - to avoid the possibility of getting stuck in the middle of the procedure, trying to get the next step right.
I read A TON on the topic, worked out this procedure, and have had good luck with it. May it serve you well! Anyone reading this with refinements to offer, I hope you’ll chime in!