Tobacco Documents Online

-,= ...:.•,. . a- N m_'5 J ~~.' 4i'~ ~ . f+i .y`. a~. r v ~ 1~r. A. !~. Thoasoa "` ~ r`, :'f r; Jun.~~967~ yyt 1T L. t. t4eyer ~ Self Sxtiasaiahiag Cigaret Butt . Aaf: "Kamo - Nayar to Thomson, April 24, 1967 '- Previous attempts at developing a built•in .eans for extinguishing ~ s cigaret before the hot coal melts the CA filter and delivers an IN acrid off-ROte Mere IIIlsncce90ful (eee Xeference mefAo) . . : ... .. .,: ~... .. . ._ .. _._ '^.+... _ •.. . ' .:_: . wY=.r ' ~ At the advice of Dr. Lsazlo, ceramic fiber samp2es were obtained from the Carboruadvx Co., and lOms filters were prepared froer same. It vis found upon inserting these ceramic fiber filters a x~ ,betxeco the tobacco rod and CA filter that the hot coal did, in ='.at least one instance, go out without melting the CA Some off-taste was noted on the fin l f ff b t it i a ew pu s, u s not clear whether this was due to the heating of the CA filter, the "s? °:`ceramic fibers, or impurities in the ceramic fibers. ; As a result of this cursory examination of cer•,tmics'it is eluded that development of a self extinguishing cigaret is =:feasible. tla further work along theee lines is presentl~ planned - /cb cc: A. E. Seligman T. S. Laszlo b