CORESTA Congress, Berlin, 2016, Smoke Science/Product Technology Groups, ST 19

Smoke analysis of fine-cut tobacco (Part 3) – Physical characterisation of fine-cut smoking articles and their variability

(1) SEITA-Imperial Tobacco, Fleury-les-Aubrais, France; (2) Reemtsma Cigarettenfabriken GmbH (an Imperial Brands PLC Company), Hamburg, Germany

There is current regulatory interest in emissions from fine-cut tobacco. Various approaches exist for measuring emissions from fine-cut tobacco, such as ISO Standard 15592, and some countries have established their own specific methods (e.g. Canada and The Netherlands).

At the CORESTA Congress in 2014 (ST05), we reported that the TNCO yields obtained from four different fine-cut smoking articles (FCSA) made following the ISO standard were correlated. Consequently, we developed a predictive model based on the data obtained from a single smoking article. At the following CORESTA SSPT meeting in 2015 (ST86), we reported that the preparation of FCSAs with highly expanded tobacco led to a pressure drop outside of the acceptable tolerances of the smoking machine, mainly due to the need for a higher volume of this tobacco at a given weight.

Further to our previous findings, additional investigations on physical characterisation of FCSAs (weights, pressure drops, tobacco density and firmness of the smoking articles) are required.

FCSA protocols are based on either a targeted tobacco weight or a targeted pressure drop, using a tube with or without a filter and incorporating expanded and non-expanded tobacco blends. Variability is then assessed from the distribution range of the physical parameters.

Results demonstrate that FCSAs are more variable than factory-made cigarettes as their preparation involves a manual process that is also more sensitive to the environmental conditions, i.e. temperature and humidity. This needs to be considered during the development of potential future regulations.