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COPY NO
CEY-T'.R_%L LAZORATORIZES
BRITISIK' TOBACCO CC.%'.?.;@.YY (AUSZMALIA)
SYDNEY
CARBON FIL-----:'RS
The Effect of Vermiculite & ?ond-ina lk,:;ents on
the Chernical. Siol-gaical & Organgle-ptic ProDar-
ties of Cigarette S-molKe
June, 1965
By: R. J.
T. 1. W-U-son
A. J. 'Walker-Powell
Approved by: W. W. Reid
Distribution:-
1. The Chairman
2. Sir Charle3 Ellis UL p,65
3. Dr. R. 3. G-riffith
4. -Mr. L. C. Lapcz te
5. Mr. W. 'el. Reid
6. I-Ir - G - A. Preston
7. Mr. I-I. Widduo
Kr. C. B. Sismay
9. Ur - S - K. Xe-shava
0.
10-12 :;Z. D. G. rcIT-oa
3-
15-17 'zi. sz.--ing
C=)
01%
CD
BATCo document for Province of British Columbia 19 April 1999

Research Department,
Central Laboratories,
British Tobacco Co. (Aust) Ltd. ,
Sydney, N. S. W.
30th June, 1965
Project WA-400
Report No. WA- 7 (F)
CARBON FILTERS
The Effect of Vermiculite & Bonding Agents on
the Chemical, Biological & Organoleptic
Properties of -Cigarette Smoke
Summary-
A chemical, biological and organoleptic evaluation was
carried out on the smoke from cigarettes using Churchmans
Triple Filter (blend 24) tobacco and having filters made from
100% carbon, 50% carbon 50% vermiculite, and 50% carbon 50%
Polythene, all in granular beds; and 100% carbon, 50% cairbon
50% vermiculite in bonded rods. A cellulose acetate filter
was.used as -a control.
it was found that a granular bed was more efficient than
a bonded rod chemically, biologically and organoleptically. it
was also found chemically, biologically and, to a lesser extent,
organoleptically that vermiculite has an "active extender"
effect over and above that of a spacing agent when used with
carbon in a granular filter. This effect did not seem to be
apparent in the case of a bonded rod containing vermiculite.
Biological activity (as measured by the Paramecium test)
showed correlation with sulphydryl binding activity (very
highly significant), percentage reduction of total volatiles
(very highly significant), percentage total volatile aldehydes
(highly significant), and percentage reduction of acrolein
(signifricant) .
ON
BATCo document for Province of British Columbia 19 April 1999