I do my decarb at the end so 30 min or so until the decarb bubbles stop is plenty to cook out any remaining traces of solvent.
I only make an RSO type oil for use in edibles and not for toking tho I do have about 10 cans of 9x filtered butane for some BHO one of these days. I can distill butane using 2 - 1L boiling balls and a 25' coil of 3/16" copper tubing so I can reuse the butane right away to process a lot more pot than letting each batch evaporate. With no pressure vessel I can't keep it for later use so may try converting a propane torch bottle for that use.
There's a gov't approved testing lab in Vancouver that charges $60/sample and will give me a cut rate as a senior and med patient so once I get all this pot processed I'll send in two samples to get real numbers on it's potency for more accurate med dosage. One will be regular RSO made with many strains of pot and the other will be the same but made with a few strains of hi-CBD pot.
I bought some gummie molds about a year ago and all the stuff I need to make gummies from different flavours of Jello. 2kg of bulk jello for about $18 from amazon . ca so got 3 flavours and all the guar gum, pot. sorbate and flavourings from all over. Made some chocolate CBD gummies in the CBD mold and those worked good. Haven't tried the gummie mix yet and need some oil for that.
Each makes 192 - 4ml candies so about 768ml to load it up. Ordered from the states so cost me $150Can for both delivered. You can get ones with various states markings as well. PJbold .com
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I tried some PAM spray on the first 3 rows but that was messy and not needed at all.
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No real chemistry involved in oil making as it's just a simple extract so if you can follow a recipe to cook then anyone can do this stuff. It's knowing how to handle the solvents safely that's the real concern and I worked in a hazardous waste disposal plant as a chemist not long after graduating where we got lots of serious safety training.