Tob. Reporter, 2008, 135-10, p. 84, ISSN.0361-5693

Tobacco processing

U.S. Patent 7,404,406 assigned to R.J. Reynolds Tobacco Co., Winston-Salem, North Carolina, USA. Tobaccos are cured in a manner so as to provide tobaccos having extremely low tobacco-specific nitrosamine (TSNA) contents. Harvested Virginia tobacco is subjected to flue-curing so as to provide flue-cured tobacco. During the curing processing steps, contact of the tobacco with nitric oxide gases, such as those produced as combustion products of propane-burning heating units, is avoided. Tobacco in curing barns is not subjected to direct-fire curing techniques, but rather, heat for tobacco curing can be provided by heat exchange or electrical heating methods.