Bubble hash machines use ice and water to extract trichomes. Cold temps makes them brittle and agitating the mix makes them break off. You do it all in varying degrees of micron filtering bags. You can get neat little washing machines, or do it by hand. The machines are inexpensive and work really well, but it depends on your volume. Then you stick it a rosin press, which is just a machine press with hot plates, to turn it into wax/shatter depending on temp/duration. All nice and healthy methods of extraction.