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BROWN & WILLIAMSON TOBACCO CORPORATION RESEARCH, DEVELOPMENT & ENGINEERING MEETING REPORT SUBJECT: LOCATION: PRESENT: DATE: CC: UPDATE BY PAPETERIES DE MAUDUIT (PDM) ON LOW SIDESTRE~M PAPERS/282 RD&E PDM - Jean-Marie Loureau (Research) Thierry Alexander (Sales) B&W - Mr. T. F. Riehl, Mr. R. H. Honeycutt, Dr. B. B. Chakraborty, Mr. L. K. Templeton, Dr. F. K. St.Charles September 12, 1985 Mr. E. E. Kohnhorst, Mr. M. L. Reynolds, Dr. J. G. Esterle, Attendees Thls meeting was held on September 5, 1985 to discuss PDM's progress on low sidestream (SS) papers. These discussions are summarized below: PDM are fixed on a 5% MgO base paper for low SS. They are now experimenting with various combinations of sodium and potassium citrate and acetate burn additives to determine their influence on SS, taste, burn rate, and appearance. The level and specific surface area of MgO, and the level and type of burn additive influence SS. The paper fiber type or form of MgO (hydrated or not) does not influence SS. PDM's Iow SS confidentiality agreement with BAT expires this month. PDM and BAT are currently negotiating a confidentiality agreement for work on SS irritation, but no contract has been signed. All developments made by PDM are available to Kimberly Clark for U.S. production if necessary and vice versa. PDM are investigating various tests for reduced cigarette i~ition ptoclivlty. C:D CO CO ClibPDF - vvwwifastio,coR1

f .S~ples Submitted to B&W Listed below are samples (two bobbins each) which we recently received from PDM. We informed PDM that these papers would be evaluated following our current test of 9 mg products at three different ventilation/filtration levels and a 6 mg vs. 9 mg product. Paper Code Key to Paper Code 12-4 DIC 5 12-4 DIC 7 12-4 DIA 5 12-4 DIA 7 13-4 DUC 7 13-4 DUC I0 13-4 DUA 7 Ist Number: Permeability (CORESTA) 2nd Number: Basis weight/10 D: MgO heated in water before casting I: 5% MgO, 20% CaC03 U: 5% MgO, 25% CaC03 C: Potassium citrate burn additive A: Potassium acetate burn additive Last Number: ~ burn additive We also received a number of handsheet samples containing 10% of the following burn additives: sodium acetate, formate, and monohydrogen phosphate, sodlum/potassium tartrate, and potassium citrate. A small number of cigarettes will be handmade for in-house sensory and analytical testing. Base Paper PDM have fixed on a 5% Mg0 low SS base paper. The total filler level has not yet been fixed. Their current base paper contains 5% ME0, has a porosity of 13 CO&ESTA, a basis weight (without burn additive) of - 45 g/M2, and is made using their "'V" process (i.e., heating Mg0 in water to form Mg(0H), prior to casting). Two reasons were given: i) They are satisfied with the performance and properties of this paper, and 2) they are not tying up their production machinery by Baking numerous runs of different base papers. Burn Additives One of the-problems that we have noted with PDM's low $S papers with potassium citrate was a low puff count. PDM are aware of this and have been experimentin$ with levels and types of burn additives. Attached is a handout from PDM showing the effects of potassium citrate (CK~), sodium citrate (CNa3), and sodium acetate (AcNa) on their low SS base paper. The data are for unfiltered cigarettes. 0 0 O0 -2- ClibPDF - www.fastio.com

Some of their findings are: • Burn rate decreases in the order CK3> AcK > CNa3 > AcNa. • Citrate tastes better than acetate. • Acetate gives a more normal ash. CNa3 gives a dark ash. The 71-3Z mix of CNa3 - AcNa also gives a bad ash. • Citrate does not affect irritation. Acetate see~ to reduce irritation. • Increasing CK3 above 5~ continues to reduce $$, but the puff count does not change. • CO/puff is highest at I~ CK3. /P What Influences Sidestream? Some of PDH's findings are as follows: - It does not matter whether MgO is hydrated as Mg(OH)~ or not. What matters is the specific surface area. A large specific surface area works best. Most of the S5 reduction occurs when going from 0 to 5% MgO; SS reduction goes from 30% to - 50% compared to a conventional paper. From 5 to I0% MgO, SS is decreased an additional 5-7%. This is similar to our findings with PDM's papers. Paper Fibers - The type of fiber used has no influence on SS. Level and Type of Burn Additive - An increase in burn additive level increases SS reduction. Sodium acetate reduces SS more than potassiu~ citrate which reduces SS more than sodium citrate. Work With BAT All of the burn additive variants on low SS papers have been submitted to Southampton. (See Telephone Conversation with Derek Irvin, attached). Also a control paper without MgO and with 51 acetate has been submitted. PDM's confidentiality agreement with BAT expires this month. After the deadline, PDM can sell their low SS papers to companies outside BAT. BAT and PDM are currently negotiating a confidentiality agreement for work on SS irritation. Even though no contract has been signed, PDH are already beginning to work in this area. 0 CO CO -3- ClibPDF - vvvvvv.fastio.com

Kimberly Clark - U.S.A. Kimberly Clark (KC) have devoted one person (Ed Bullwinkle) to work on sidestream full time. He is starting with a ground up approach to look for ways other than MgO to reduce SS. Anything developed at either PI~ or KC would be transferred to the other location for production if necessary. .Low Ignition Proclivity PDM has tried three different tests for measuring ignition proclivity: ii 2. . Burning cigarette placed on polyurethane foam. Burning cigarettes placed on thick paper and the weight loss measured. Critical Oxygen Index - Determining the minimum oxygen level necessary to support cigarette combustion. They stated that Marlboro gave the worst results on this test. It supported combustion with 12% oxygen. F. K. St.Charles FKS/sek 1561k Attachment 0 u (30 -4- ClibPDF - www.fastio.com

EFFECT OF COMBUSTION SALT ON SIDESTREA/~ DELIVERIES TYPE OF SALT SALT AMOUNT (=) MAINSTREAM ITM (mg/cig) $IDESTREAM TPM (mg/cig) SIDESTREAM EMISSION (mg/mn} SIDESTREAM REDUCTION (%J ~ontro130C 1 10 28 34.3 3.5 CK3 i0 8 26.3 15.5 2.2 55 CNa~ i0 9 31.5 17 .5 Z~9 CNa3-AcNa 7-3 9.5 28.3 16.3 1.8 52 Paper: 45 g/m= 35Z filler 13 CORESTA AcNa 7 I0 15.3 1.7 55 0 0 CXD "4D ClibPDF - www.fastio.com

BROW L WILLIAMSON TOBACCO CORPORATION RESEARCH, DEVELOPMENT L ENGINEERING TELEPHONE CONVERSATION SUBJECT: CONTACT: DATE: CC: LOW SIDESTREAM CIGARETTES/282 Derek Irwin, GR&DC September 12, 1985 Mr. E. E. Kohnhorst, Mr. M. L. Reynolds, Mr. T. F. Riehl, Mr. R. H. Honeycutt, Dr. B. B. Chakraborty, Mr. L. K. Templeton .--- ! telephoned Derek I~iu on 9/5/B5 to get an update on their work with low sidestream (55) cigarettes. He stated that there has not been much work on 5S in the last few months. They have received a lot of paper samples from Papeteries DeMauduit (PI~) and have made cigarette samples, but do not have results yet. He will give us the results as they become available. He noted that the acetate burn additives on PDM's paper gave slightly better 55 reduction, burned slower, smelled better, and the ash looked better than papers with citrate burn additive. Paul Case has been adding acids to low SS papers to reduce SS nicotine and, hopefully, $5 irritation. Derek stated that 8~ NgClz added to stem (at 20~ inclusion) decreased SS nicotine. The MgC12 also depressed mainstream impact dramatically but did not alter smoke pH. F. K. St.Charles FKSlsek 1562k 0 0 O0 ClibPDF - www.fastio.com