Quote Originally Posted by mark08
aright thanks man, one more question lol i've left the weed in the acetone for about 24 hours now, the colour is now a very dark greenish brown color is ready to put onto the plate?
It is... but still there is some THC left in the weed. So, after you put the brown acetone in the plate, put some pure acetone in the bottle with weed and let it soaking for about one week, to ensure you extract all the THC that may have remained in the weed after the first extraction.

BTW, while in the recipe ive said to let the acetone evaporate naturally in a plate, when i do it myself i put the acetone in a wine glass, put this glass into a water bath and heat the water with an electric water heater. The water heats the acetone, and it evaporates WAY faster.
I didnt said it in the recipe because doing it is FAR dangerous, as acetone is VERY flammable, and its vapours are even more, so all the caution must be exercised when doing it, to avoid that the acetones vapours enter in contact with anything hot, sparks or flames, that could make it ignite (or even explode).
I noticed that letting the acetone evaporate by itself (without heating) causes the appearing of water in the acetone, and it slows down the evaporation and hinders a bit the hash oil precipitation. But it still works very well. So, you can evaporate it the way you choose.