Croup Research & Development Centre,
British-American Tobacco Co. Ltd.,
SOUTHA.MPTON.
TH/GAF/CAL/61 l7th July 1978.
CRADE MATCHING ON SMOKE AND TOBACCO CHEMISTRY
(Report No. RD.1603 Restricted)
1. SUMANX A14D CONCLUSIONS
The possibility of matching the smoke and tobacco
chemistries of
U.S. flue-cured grades of tobacco by blends of
third world flue-cured
grades has been investigated using linear
programming techniques. The
constraints took the form of O/WP peak areas (for
smoke matching) or
concentrations of tobacco components. From this
exercise a U.S. grade
of low plant position was chosen and optimal
solutions were computed
using both maximum and minimum cost objective
functions. The closeness
of match of the computer solutions was then
assessed by blend production
and subsequent smoke and tobacco analyses which
also allowed the
correspondence of smoke and tobacco chemistry to
be examined.
The results indicated that the smoke or tobacco
chemistry of the
target grade could be matched by combinations of
the third world grades
on only a small number of OIWP peaks or tobacco
components (up to 6).
Because of this, the correlations within the two
groups of properties
were taken into account (using cluster analysis)
to produce the
sclection of peaks or components which produced
the best overall match.
C=
c::::
CL:
BATCo document for Province of BritiSh Columbia 23
April 1999


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The work has shown that matching on only a small
number of smoke
or tobacco properties can produce comparable
cigarettes, although
subjective evaluation has shown that none of the
target matches
obtained to date was a good smoking match for the
target. Furthermore,
the work has shown that although a tobacco match
may correspond to a
smoke match the converse is unlikely to be true.
Continued investigations
are being planned.
CD
03
BATCo document for Province of BritiSh Columbia 23
April 1999