When I do kiff and make it into a brick, chunk, or whatever. I use the press method. Basically, you get something that isn't going to crush under pressure to use as a mold. I have a milled-out piece of 1/2" aluminum stock that's been polished. The shape is a sharp-cornered, hollow square of about one inch, although the sharpness of the corners probably doesn't matter. I have a pair of flat, 1/2" aluminum plates, about 5" square, four "slugs" of aluminum squares about the same size as the mold, and one 1/4' slug that's about the same size as the cutout in my mold.

To assemble the press, I center a piece of waxed paper on one flat plate, and put the mold on the paper. I fill it with kiff and squash it in as much as I can by hand or pliers with the slug that fits the cutout. Then I add more and keep squashing till I can't get any more into the mold. Then I add some more so it's generously heaping. I arrange the four slugs around the corners of the plate, and then top it all with the other plate.

I do my pressing right on the street, since that's where everyone parks their hash press. I place the assembled press right under the jack mount for the right front of my van. I put my jack on top of that, and raise the front of the van. Instant 2.5-ton press, if I have a full tank of gas!

I can tell when the mold is ready for more, because it will compress everything till the top plate touches the slugs. I keep adding more till it won't compress fully, and then I go take a nap.

When I wake up, that last bit has compressed, and the brick is ready to remove and dry. There will be a smattering of "stuff" that oozed out the bottom of the mold and onto the waxed paper. That's probably water, and you don't need to try to salvage it unless you think there's something important in there you want to consume. I don't think there is.

I remove the .5 cubic inch brick and heat it over a 40w bulb in a desk lamp for a couple hours or so. I have a desk lamp with a glass chimney shade. I made a trivit to hold the brick from pipe cleaners. It will get sticky, and turn dark. Then I put the brick in a jar, suspended over dehydrated epson salts (bake the epson salts in the oven @400f for 4 hours. They will turn into a single mass the size and shape of the container they're in) and put it in a room-temp, dark place for a week or so. Epson salts will absorb close to their own weight in water, so it doesn't take much to process a half-inch of hash. The epson salts draw out the moisture, and you have a tasty result!