![]() ![]() Roll your own (RYO) tobacco denotes any tobacco product which, because of its appearance, type, packaging, or labelling, is suitable for use and likely to be offered to, or purchased by, consumers as tobacco for making cigarettes. Similarly, the physical and chemical characteristics of cigarettes interact to alter the size distribution of the aerosol particles that convey nicotine and other chemicals, and thus influence absorption (WHO 2007b). Cigarette ventilation designs also modify free nicotine levels in the smoke. For example, the size of the cuttings of the tobacco in cigarettes and non-combusted and non-heated tobacco, and its level of acidity (measured as pH), interact to influence the release of nicotine from the product (Callicutt et al. The physical design characteristics of the tobacco product interact with its chemical composition to influence its function and effect (WHO 2001). to facilitate manufacture, increase shelf life, control burn rates, nicotine delivery, flavour and harshness/irritation etc. Cigarette additives have a range of purposes e.g. It is also important to consider factors such as tobacco weight or density, and cigarette geometry (circumference and length). Design features encompass a wide range of design variables such as tobacco type and blend, chemical processing and additives, and in addition, physical features such as paper, filter and ventilation. Cigarettes are highly engineered, exquisitely designed “nicotine delivery devices”. Cigarettes are made from fine-cut tobacco leaves and are wrapped in paper or other non-tobacco material, filter–tipped or untipped, approximately 8 mm in diameter and 70-120 mm in length. Each of these types is produced by using different tobaccos and additives and by using different manufacturing practices (Reviewed in IARC Monographs: 1985 1986 20).Ĭigarette: The most common form of tobacco is the manufactured cigarette. 2.1 What are the main tobacco products?Ī wide variety of tobacco products are available worldwide such as cigarettes, cigars, pipe tobaccos, smokeless tobacco products (STP) etc. ![]()
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