Group Research & Development Centre,
British-American Tobacco Co. Ltd.,
SOUTHMPTON.
FJD/RA/46C-1 26th August, 1981
THE EFFECT OF VENTILATION ON PUFF BY PUFF SMOKE
DELIVERIES
(Report No. RD.1826 Restricted)
SU1,124ARY k-1TD CONCLUSIONS
In a previous report it was shown that the rate of
change in
ventilation level as the cigarette is smoked
depended upon whether the
bulk of the ventilation is through the tipping or
the cigarette paper.
The minimum change occurs when the maximum
proportion of the ventilation
is through the tipping. Mnilst this is of
interest, the main point of
concern in cigarette design is the effect of
changing the balance of
ventilation between the paper and filter on the
deliveries of smoke
constituents. The report covers this effect for
PMWNF, nicotine, carbon
monoxide and nitric oxide.
It is shown that, by suitable choice of
conventional cigarette
papers, tippings and filters there is scope for
designing cigarettes
which have the same delivery of Pl,R4NF (say 9 mg)
but differing deliveries
of other smoke components or puff number, although
a completely even or
"flat" per puff delivery cannot be achieved.
BATCo document for Province of BritiSh Columbia 3
November 1999