Tobacco Documents Online

PROJECT TITLE: Applied Technology CHARGE NUMBER:. 2108 PROJECT LEADER: Peter Martin PERIOD COVERED: July 1 - 31, 1981 DATE OF REPORT: August'5, 1981 [ IT F I i L L PROJECT GROW Experiments have been conducted to verify that human smoking of the Barclay cigarette is done at lower dilutions than achieved on the smoking machine. Cigarettes have been made with longer lengths of filter to demonstrate that the holding device for the PPA does not force subjects to reduce the dilution by holding the cigarette on the edge of their lips. Barclay type cigarettes have also been made and tested with hollow plastic inserts in the flutes, plastic collars overlapping the edge of the filter and porous plug wrap instead of non- porous wrap. The former two demonstrate the degree.of closure of the end of the channels, the latter is used to demonstrate that the Barclay turbulent smoke stream can be reproduced without the same delivery characteristics. This is important since B & W claims that the turbulent smoke stream is responsible for the high impact of the Barclay cigarettes. NATURALLY OCCURRING DENITRIFICATION A series of fed batch runs have been made in the pilot plant with better control on flow rates, miuing and temperatures. Using an innoculum originating from a Phaurostat many denitrification runs have been made and a considerable improvement was made in both the average time and the variability. After the start-up, when quite long durations occurred, duration times were as short as five hours with standard deviations of less than three hours. Some control sheet has been made with the new Reverse Roll Coater and it seems that the SEL should be concentrated to 50% dissolved soluables. HEAT.TREATMENT OF TOBACCO MATERIALS A project has been started with the Analytical Division to reproduce the CV-OV phase diagram for Bright tobacco, in conjunction with Rarl Fisher water and mercury SV measurements of the samples.. Measurements have also begun to produce similar phase diagrams far Burley and Oriental tobacco. Work continued on the characterization of Oriental tobacco. In a closed system, at approximately 12% input OV, Oriental tobacco gives smaller CV increases than Bright or Burley. The average CV increase was between 10 and 12'ccfl0gm. LASER APPLICATION A device has been built to investigate the "Zebra Stripes" on BL sheet. A strip of sheet is wrapped around a transparent cylinder and rotated at a constant angular velocity between a light source and:a detector. This signal is run into a spectrum analyser where a Fourier transform is made to look at the relative amplitudes in frequency space. Several runs have been made at different conditions at the BL plant and these are being compared to determine whether this method has sufficient sensitivity. Pm/mmn