DSFH/JRW 9th Septe-mber, lq5q.
STRICTLY PRIVATE & CONFID"NTIAL.
.t!
TOBACCO AS A FILTZR HED -IL11-1 FOR
CIdTT-~E-TTE6."
Extensive tests have been carried out to
investigate the possibility of using finely cut
tobacco
for the manufacture of filter rods for cigarettes.
These tests have shown that the u-se of such
filters
presents possibilities of importance. Some of the
advantages and attributes of such a filter are:-
(a) Greatly_enhanced Tobacco Taste-and.
A criticism of normal filter
material has always been that the
smoke drawn through such a filter is
insipid and tasteless. The -se of
tobacco as a filter material gives the
smoke considerably greater tobacco
character than that which is ra-,.sed
through a normal filter. The nature
of the tobacco used as a filter has a
pronounced influence or- the taste.
This fact opens up a large fi -eld of
possibilities: the high grade tobacco
used in the filtqr tip may i-.-~,rove the
smolrinC qualities of a 1o,7 grale blend
or disguise the unpleasant elaracter
of some loca3 type of leaf.
Alternatively, the use of Oriental
leaf in the filter tip im--arts a
pronounced Oriental. flavour to the
smoke. It is thus possible that it
may be found preferable in blended or
American-ty--je c-i-arettes to usr- a
filter tip made of Oriental to):~cco
and to ouit the usual percentage of
Oriental leaf from the blend. A
large number of conibinations may be
tried, such as the use of an Oriental
filter tip with a Virginia flue-cured,
cigarette, the use of a Virginia flue-
cured tip with a blended cigarette,
the use of a fermented blac'- filter
tip vith a Virginia or blended
cigarette or vice versa. Ftrthermorc,
exreriments may be uade flavourin?~ the
tosacco used for the-filter rod '-)u-t
not necessarily that used in the
cigarette. This would Make it possik-le
to experiment with flavours have
an unsuitable aro-a when burnt but w!-iich
might affect the si--ioke 4.n a pleasing
way when used on the tobacco in the tip.
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BATCo document for Province of British Columbia 29
October 1999


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(b) XsLit of Manufacture.
Filter rods made according to these
details may be made on most Cigarette
Making Machines and filter tirped
cigarettes, using these rods, T-ay be
made up on any conventional filter
tipping unit.
In territories where ini;ort
restrictions or lac's of local manu-
facturing facilities make the use of
materials such as cellulose acetate
or crimped paper difficult or expensive
or impossible this type of filter may
be readily maAe.
(c) Good.Filtration Efficiency.
This compares favourably rith a
cellulose acetate filter of 51100?000
denier of the same length -hen the leaf
tobacco to be used in the filter is
converted into rag at 200 cuts --er inch.
Finer cr-ts increase the filtration
efficiency but at the sarie time also
increase the dra!? resistance. For
this reason it may be found that the
optimum cuts to the inch are 20P.
For accertable dra,.! resistance us" ng
this tobacco, it has been found that
the filter rods should have a density
of arproximately .39 9. ,er cc.
For instance, filter rods r_-ieasiiring
90 mm. x 25-75 mm. vay be trade at
15 to the ounce. The raper used
as a i-.rra~per for the filter rods may
be Crompton's Verge .2122.
(d) Attractive _Ap_,)qjqi~_qnce arj4,_Sq_1es.
Value.
The appearance of cigarettes made
up with a tobacco filter is particularly
attractive when the tobacco used in the
filter is of a sharply contrasting shade
to that used in the cigarette; for
instance, the use of a bright Flue-cured
tip on a blended cigarette. There
would seem to be nuch score in
advertising such cigarettes3 its
enhanced and "full" tobacco taste, its
effective but unobtrusive smoke
filtration, the fact that its composition
consists entirely of-tobacco, are some
of the points whic-h night be used.
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BATCo document for Province of British Columbia 29
October 1999