I admit I have only read about 20 or 30 pages of this thread so may have missed a similar comment. I spent some time in Morocco and other hash producing countries. I like to press my powder they way I learned to do it in North Africa:
- Make a small (or large!) booked-shape packet using cellophane (like comes on a cigaette pack--I use the cellophane from them all the time for small chunks) and scotch tape. Just like wrapping a Xmas present but with no present inside yet.
- Fill with powder and tape shut.
- Heat the packet in the microwave or on a hot surface.
- Press between two pieces of wood placed in a vice and crank down. If it is too hot, smoke will billow out at this point. Some smoke is okay.
- Take out of the vice and cool.
- Enjoy.
The hash will sort of blend together, carmelize from the heat and pressing to form a proper piece of hash. The better stuff is usually bendable. I like to heat a corner of the chunk slightly with my lighter just before rubbing off small pieces for the pipe. I prefer smoking well-pressed hash rather than powder. I believe it has a nicer, more efficient burn.