That sounds more of a method to make Hash oil, not actual hash.

To make hash, there are a few ways to do it. A bubblebag is one way, but you need several hundred grams to use those.

Ice hash or cold water hash is another.

The method I use is the dry seiving method. I find it works the best and it can be done in a mtter of 15min. That's done by shaking the trichs from the leaves.

If you want a more detailed version on how to make it, just ask.