Kief is a substance derived from cannabis and consisting - for the most part, as you’re about to see - of glandular trichomes. It is, therefore, a resin extraction of considerably higher strength (cannabinoid concentration) than the buds used in its preparation. Given its old age and popularity in many disparate areas, it has multiple names like kifi, kif, skuff, dry sift, and of course, kief.
As is often the case with extracts obtained without solvents, you can find differing qualities, which depend on a number of factors as varied as the cannabis strains used and the mesh size of the sieves with which the plant matter is sifted. Let's see exactly what kief is and how to obtain it.