above would be the first sift and the most potent and pure kif you can get. It is up to you how much more you want to sift your buds. For the sake of this thread, I will sift a little more to show you the results, the final product, and the left over bud that can be used for other things.

I have sifted the bud as much as I would like now. You can see how the bud has broken up. I use a light rubbing motion on the screen and I shake the box a bit helping the trichomes to fall through. There is quite a lot of "shake" left on top of the screen. Most of the trichomes have been removed from it. You can do a lot with this "by-product". If you started off with very potent herb, chances are this leftover is still pretty potent and can smoked, or added to food, or whatever you like. It makes a very nice joint or blunt with friends. The stuff on the bottom is what we're after though.