Saturated etoh extract definitely will crystallize over time. Or at least some of my extracts have by accident. If you want to crash them out using “cryo” conditions you’ll need to find just the right amount of ethanol to leave in solution to allow for molecular mobility. Not impossible, but will be totally batch dependent based on the amount other solvents are present (terpenes, esters, ketones, alcohols, etc). Not sure exactly what temp thc-a becomes significantly less soluble in ethanol, at least to crash out, but i’m willing to bet it’s around -80 or below.
