I have heard of people using regular ice with dry ice. I am going to give it a try.
Re-sifting does not work when the contaminants are the same size as your resin.
Yes it does, but that once again depends on technique, correct resifting will help purify your resin. Do a search through this forum for lots of excellent posts about "dry sifting" for more info on how to improve your quality.
i would say dry ice hash on average is 75% contaminant.. maybe higher..
i think people are missing the point that in water extraction.. its the WATER that acts as a transfer chamber and allows you to isolate just the heads... why is this.. because everything floats while the heads sinks.. remove the water and EVERYTHING sinks.. i would say dry ice hash on average is 75% contaminant.. maybe higher.. where as bubble is generaly 90 to 98% gland heads..
check it out with a microscope.. sure you get more.. but more of what? its certainly not glandular heads..
Bubble man