I wanted to try this, so I got some hash and gave it a go.
Somehow I managed to turn 1.2 into 1.4 but I didn't press it in towels many times. The water turned a fucking skanky yellow, looked rank as.
I tried a reef before purifying to give it a test, and in a few days (I'm going to let it sit there) I'll report back on the difference.
Great thread bong man, helped many Brits out with this.