| 摘要 |
<p>A low fire spreading cigarette comprising a high density region (6) formed in the center of a paper tube (2) and containing ordinary shred tobacco filled at a density of 0.15-0.35 g/cm3, e.g. 0.25 g/cm3, and a low density region (8) formed between the paper tube (2) and the high density region (6) and containing swelled tobacco filled at a density of 0.05-0.15 g/cm3, e.g. 0.14 g/cm3, the thickness of the low density region (8) defined between the paper tube (2) and the high density region (6) ranging from 1 to 3mm.</p> |
