Dry sieve hash
A mechanical separation process which generally uses a variety of screens and agitation to separate the trichome from the plant material, dry sieve hash is also traditionally known as “kief.” One of the oldest cannabis extraction processes, dry sieve can be traced back through centuries to the great Moroccan, Afghani, and Lebanese hash fields; traditional Lebanese blonde hash is in fact nothing more than pressed dry sieve. This method can be perfected to produce perhaps the highest-purity and most natural concentrate available (nothing but trichome heads), but generally, it is less pure than high-grade water hash or hash oil because it is more difficult to remove all of the plant matter. Quality dry sieve will generally test between 50 percent and 60 percent THC, but the ultra-pure examples can have higher content.
