I have about 600G of bud I have been trying to process into hash oil and experimenting with. For 100g, I used acetone and was impressed it with the results, but was really worried about the safety. for 200G I used everclear but it was way more costly, took longer and didnt seem to absorb the same amount of oil per ml. The bud was cut up, soaked in a jar of the solvent at room temperature, then poured through a very cheap metal coffee filter, probably atleast 150 micron then the bud was placed into a ziplock bag and squeezed the last bits of solvent out. Then it was slowly evaporated. The resulting oil obtained is about 100ml in a pint jar. The color is very dark and doesnt seem to be homogenous at all. Sometimes it appears dark red, with golden sediment int he bottom. Sometimes appears to be dark green/black oil. The viscosity is the most interesting part, it seems to be a liquid even below room temperature. It does seem to harden up well in the freezer and also boils within a couple seconds in the microwave. Im not too familiar with how all this works but the purity of my oil seems to be quite high, atleast 60%. The things that i am worried about though is the stability of it, Bacterial growth and inadvertent extraction of dust from the surface of the bud. I now have some bud soaking in 70% ISO that has been frozen. The idea here being that the unwanted plant components are frozen in water and the liquid ISO contains the Cannabinoids. I will see how that works out but how can i clean up my end result? I was thinking that I could dissolve the oil in vodka, push it through a extra fine filter, then evaporate the ethanol, let the oil settle out of the water, then decant it off??????