Tobacco Documents Online

Reports on research to determine "the ventilation level of ventilated cigarettes during human smoking, without any disturbance of equipment on the cigarette during smoking" using random samples of Philip Morris Ultra Lights and Barclay. Concludes that method could be used to predict tar and nicotine level of cigarettes smoked as per NEN 3382. Includes data and calculations.

Examines three "cigarette-design tools" used by Philip Morris in developing low delivery cigarettes: filter efficiency, filter dilution, and inclusion of expanded tobacco. Explains process of reducing tar and CO without changing the puff count. Emphasizes current use of filter dilution and expanded tobacco in development of low tar cigarettes, noting that "only RJR and Philip Morris have their own technical process for expanding tobacco."

Posits that filter dilution could adversely affect "the ambient smoke issue" due to increased emission of smoke constituents. Cautions that "widespread use of Exit type filters with the associated high degree of variability of smoke dilution experienced by the smoker might lead the authorities to stipulating that filter dilution must be suppressed on smoking machine measurements of the smoke yield." Suggests projects focused on filler modifications resulting in reduced filler combustion which, in turn, would result in reduction in smoke yield while maintaining puff count.

Reports on experiment to "determine whether the increase in nicotine-to-TPM ratio with increasing filter dilution is caused by a filter phenomenon or by a rod phenomenon." Finds that a rod phenomenon is responsible for the increase.

Presents results of efforts "to develop mathematical models for treating filter dilution in computer modeling systems used for cigarette design applications." Includes references.

Reports on findings from study to examine how deeply cigarettes are habitually inserted between smokers' lips and whether PPA holder interferes significantly with cigarette holding patterns. Includes illustration.

Reports on reduction of smoke constutuents in Parliament 100s with 20% dilution versus Parliament 100s with holes covered.

Reports on BAT Suisse study to determine maximum insertion depth of cigarettes by smokers and related lip occlusion of ventilation holes. Finds that average insertion depth among 24 ventilated brands is 12mm, noting that "highly ventilated cigarettes are inserted deeply into the smokers mouth and consequently the ventilation level is reduced during normal human smoking."

Describes smoking machine designed to measure smoke delivery, but which does not accurately report what a smoker actually receives. Details machine data collection and how this varies from human smoking. Reports that smokers smoked more intensely under stressful lab conditions. Describes importance of nicotine in smoking, and dual stimulant/relaxant effect. Finds that smokers compensate to achieve higher nicotine delivery from lower tar products. Suggests smoking habit might be rejected if nicotine levels were too low.

Posits that the concept of high nicotine/low tar products is not new. Cautions against confusing TPM/nicotine ratio with PMWNF/nicotine ratios. Identifies ratios that empirically indicate "norms" for latter part of 1977, and points out difficulties in producing ratios of 6 using conventional tobacco blends. Includes delivery data for various cigarette brands.