Tobacco Documents Online

FTR RESEARCH AND DEVELOPMENT P.O. Box CH-2003 NeuchAtel INTER-OFFICE CORRESPONDENCE To: Dr. M.C. Bourlas 3S 70 (9c-7) a6G Date: Oc tober 12, 1981. From: H. Gaisch Number: The future of Filter Dilution. Subject: Presently, filter dilution is used for the reduction of gas phase delivery and for balancing the effects of the introduction of expanded tobacco on the puff count of a cigarette. I can foresee a scenario in which filter dilution could become an embarrassment rather than a help. the puff count is maintained. 1. The ambient smoke issue could become so important that the increased emission of smoke constituents caused by the use of filter dilution becomes unacceptable. 2. A widespread use of Exit type filters with the associa- ted high degree of variability of smoke dilution expe- rienced by the smoker might lead the authorities to stipulating that filter dilution must be suppressed on smoking machine measurements of the smoke yield. I would like to suggest to accelerate projects which deal with filler modifications such as the application of salt casing, bio-transformations etc. which result in the re- duction of the combustion rate of the filler, in particu- lar of expanded filler. The objective should be to reduce the total amount of organic matrix available for combustion and pyrolysis in the cigarette in order to achieve the desirable reduction in smoke yield of the product whilst, at the same time, cc: Mr. J. Gibson W. D. U. Fink Schulthess Nyffeler N ~ 0 r..: w N A 0 Cn 0