DustBomb- They sell it at Alberstons Grocery stores. It's located in a chest cooler behind customer service counters.
Beats the HELL out of bubble, water or any other method I have tried as:
1. NO fire danger whatsoever!
2. NO fumes or chemicals!
3. NO residues or other harmful additives mixed in...this is fairly pure kief.
4. FAST results, and the results speak for themselves.
5. Does not count as a 'manufactured' product as it is straight kief, (you can collect kief just by emptying out your bags on a regular basis). HASH is heated and pressed which counts as 'manufactured' and many times the po-pos will try to add that mfg charge on cause they are dicks! Beat them at thier own game and don't make it easy for em!
Things to watch for:
DON'T shake/agitate your 220 micron Boldt bag too long, as it will start to add vegetative matter to your otherwise golden kief, turning it greenish.
DON'T touch the dry ice with your hands or wihout thick gloves on...dry ice is frozen CO2 and it has an approx temp of 109.3 degrees below zero. You will get a bad skin burn if you are not careful!
You can google with the terms dry ice kief and you should get lot's of hits, just be SAFE out there!