I don't know what you call it but what I do is get a bud buster and wet the lid and then bust the weed u and the crystals will stick to the top of the lid some weed might still be on the lid just scrape it off with a tooth pick or something then roll it up with your fingers and keep compressing it as hard as you can get it then throw it in the freezer for about ten minutes then smoke how you will I found the best way is hot knives or in a bong in a bunch of little balls. the left over ain't that good but if you make a lot I guess u can use it to make oil or whatever if you got good weed you get get ant least a eighth of hash out of a quarter of weed