Western matches are sulfur, not phosphorous.... but I guess some people wouldn't know or bother to find out.
Tar is popular with manufacturers because they don't isolate the morphine. They just add acetic anhydride to (dirty) opium. By dirty, I mean it hasn't been washed to remove non-soluble crap like bits of plant matter. I think I saw a 'how to shoot tar' in which this crap is removed yet it seems like too much work for too many souls. For a long time I have suggested that tar is more toxic than brown because 6-acetyl codeine is present. We know the LD50 of both drugs, but nobody has researched the LD50 of the mixture.
I'm just surprised opium hasn't got a market. GOOD (clean) opium is a world better than H apart from the rush. Your getting ALL the alkaloids, smoking (or swallowing) it so it's safer (Hep C kills x4 more IV users than HIV) and the dreams are wonderful. Nature knows best is NOT a declaration I stand by but in this case, I truly think that natural opium is the way to go.
Just be greatful you don't live in Russia because if you have a BIG habit and no money, what are YOU going to do. Especially now, since codeine/paracetamol pills are off the market. I bet there is a crime wave of people looking for the money for H. On the other hand, I pity those in the US with draconian laws and no free methadone. Holland has the Methadone bus so you can walk up and get a dose. OK, they start low but you can go 3 times a day and then they increase. Go 3x7 times in a row (a week) and your on a program to stabilize your dose. In the EU, depriving a patient of medication is a crime so get arrested, you still get it, go inside, you still get it.