Tobacco Documents Online

CHARGE NUMBER: 4009 PROJECT TITLE: Smoke Studies PROJECT LEADER: B. Goodman PERIOD COVERED: July, 1981 I. HUMAN SMOKER SIMULATOR A. Extended Smoking Study All panelists have completed the Merit Ultra Lights phase and have changed back to their original brand for the final four weeks of recorded smokings. The smoking results from the first twa parts of the study are being tabulated for statistical analyses. B. Simulator Equipment Two pieces of equipment have been completed by Engineering Services. The initial evaluation in the lab.is in progress for both units. The proto- type smoking profile recording unit will permit collection of puffs from smokers with flow rates up to 7,000 cc/min. A new digital flow meter that is needed to calibrate the prototype recording unit, and later on the new Simulator, was designed to have a capability of 10,000 cc/min. flow. CAD personnel have completed programmtng of the dedicated'microprocessor. Testing of the system has shown that it works well, and training in usage of the operation has started. It will be completed when the user and system documentation is finished. II. WRAPPER AND FILLER MODIFICATIONS A. Cation/Anion Ratio Study Wrappers and cigarettes have been made for the potassium citrate and sodium carbonate series. Salts of sodium phosphate and sodium acetate will be coated in August. Previous problems in the analysis of chloride on wrapper have been resolved. Results of sodium chloride additions showed fewer effects on delivery than the sodium citrate series. Delivery of TPM, tar and CO tended to rise as the total salt loading increased. Very high deliiveries were found when chloride increased at constant sodium levels. Delivery d'id not increase as much when sodium increased at constant chloride levels. No significant changes were found in delivery of the pyrolysis products nicotine and acetal- dehyde. Puff count tended'to decrease as sodium chloride levels increased. Significant reductions i,n puff count occurred as sodium increased at constant chloride addition. Trends towards higher puff counts were found when chloride increased at constant sodium. Further work will concentrate on isolating delivery effects of the sodium cation versus both citrate and:chloride anions. B. Base Paper Study The in-house art of paper making was developed further by having one project member attend a course in "Pulp and Paper Technology." I

-2- ;.- (. [ r ~ L Handsheet techniques have been developed to the point where a sufficient quantity can be made for splicing iinto a small bobbin to be used for machine- made cigarettes. A low ash wrapper with Ti02 added to provide adequate opacity has been selected as the preferred composition for further burn studies. C. Low Sidestream During work performed to develop technology for reducing the quantity of sidestream smoke, some wrapper additives were found to reduce the amount of sidestream smoke that.is seen coming off the cigarette. A quantitative method for measuring the visibility of smoke has been developed by the Filtration Physics project and is now in use for testing cigarettes with experimental wrappers, both from suppliers and in-house. The percentage of monochromatic light extinguished by the sidestream smoke is measured numerically via a detector and the pattern is displayed on a stripchart. Development work is progressing on a smoke chamber and methods of analyzing results. ~3. C~4o B. Goo a n BG/lad F