Seems to me that a percentage of tar generated by burned tobacco in a cigarette would deposit on the unsmoked tobacco behind it, giving the tobacco near the filter a higher level of tar than tobacco at the open end. Is twice-baked tar more harmful than first-generation? If so, is the second half of a cigarette significantly more harmful than the first?
I’m not sure if the twice-bakedness of it makes it more harmful (although it is possible, if being subjected to further heating breaks it down into a different blend of chemicals), but it is certainly true that tar liberated from the burning end is deposited on the tobacco as the smoke is drawn through it and I can’t see any reason why this, or most of it, wouldn’t be liberated again as the cigarette burns down.
I have to agree. When smoking a joint, it’s very obvious that a lot of tar is captured in the roach.
The roach is definitely more potent than the rest of the joint.