Hash, by definition, is an extract of Cannabis. There are many different ways of preparing hash, but perhaps the biggest hurdle is learning how to derive the active ingredient, Tetrahydrocannabinol (abbreviated THC) from the plant. THC is found in the highest concentration of the Cannabis buds, but there are also deposits of the same in the plant’s leaves, and to a lesser extent, the stems. When making hash, however, it is important to use all the three parts of the plant to increase the ...