Never heard of dry ice hash...sounds very interesting. The only hash I really like is bubble hash or finger hash. I used to trim for work and oh the finger hash I had
you just throw a few chunks of dry ice into your bubble bag, pour your dry trimmings or partially ground popcorns into the bubble bag and pull the string tight.
Shake it real good over a piece of glass, scrap the kief up with a ID or old gift card. And press it into hash.
The yield is probably 90% as good as bubble hash, but the quality of end product is a little bit better when i do it vs bubble hash, personally anyway, and it can be pressed and smoked right away.
The terp content of freshly made dry ice hash can be a bit crazy, and before it dries out a bit, it can be like the consistency of modeling clay or playdough lol. Usually very blonde stuff too, even with larger micron sizes. There's a lot of good guides on the web for it too.
This is obviously just my opinion, but dry ice sift is probably my favorite kind of hash. Def the easiest to make. The actual end quality potential is probably technically a little better with bubble hash. But its a way more complicated and time consuming process, and imho, i get more terps left behind with dry ice most of the time. Even if a little more odd specs of green come through.