Black Tar Opium. Most of the time, the term "Black Tar" is used to describe heroin but in some cases, you will hear the term black tar opium. The substance is a black, sticky residue that can be smoked to produce a high that lasts about 30 minutes to an hour depending on the potency of the drug and various other factors.Dec 23, 2017 · About 20 years ago, we would get black hash, that wasn’t overly good, but the taste n smell , hold a special spot for me. I’ve been trying to recreate this hash for a very long time. I think I’m coming close but I can’t get it 100%, last run was too soft n inside color was off. But it’s good ...