i store mine up for several grows in black plastic bags. Then when i have about six black bags worth, i use a bubble sack and food mixer to extract the thc to make resin. a silk screen works ok, but you have to let the leaves completely dry out first. Have been tempten to give them a wizz in a smoothie maker using ethenol as a liquid, and then filtering off the crap, and leave what's left to evaporate off. Thc disolves in alcohol, so it may work, give it a go with your leaves, and let me know if it works before i wreck my smoothie maker for nothing, be cool!!