Impact of self-extinguishment during smoking on consumer exposure – Part II: Simulations
Cigarette mainstream smoke yields are broadly proportional to the quantity of tobacco burned during puffs. A mathematical model was developed previously (see Part I: Modelling) to calculate this quantity of tobacco burned for lower ignition propensity (LIP) cigarettes presenting a certain probability of self-extinguishment during smoking.
The model was used to assess the impact of the probability level on exposure of a virtual population of cigarette consumers. Various smoking conditions were considered with puff durations ranging from 1 to 3 seconds, puff interval from 30 to 90 seconds and puff volume from 20 to 70 millilitres. The distance between bands was kept constant but the first band was positioned randomly as is usually the case with manufactured products.
For a given cigarette design, simulations showed a wide range of tobacco burned during puff for a population of smokers. Interestingly, the distribution of tobacco burned during puff moves to upper levels when the risk of self-extinguishment increases and the impact is inversely proportional to the smoking intensity. This means that consumers having non-intense smoking behaviour seem to be more impacted by self-extinguishment than consumers having intense smoking behaviour.