Cigarettes look like a simply made product that consists of paper tubes, chopped up tobacco leaf, usually with a filter at the mouth end.
Actually, they are highly engineered products, meant for deliver a steady amount of nicotine.
Tobacco that is inserted in a cigarette is mixed from two main leaf varieties: Virginia that is as well called yellowish ‘bright’ and which has 2.5-3 percent nicotine and ‘burley’ tobacco which contains higher nicotine content (3.5-4 percent).
US blends as well have more than 10% of imported ‘oriental’ tobacco which is fragrant but contains less than 2 percent nicotine.
In line with the leaf blend, cigarettes have ‘fillers’ which comprise the stems and other bits of tobacco, which would otherwise be unneeded products. Fillers are mixed with water and different additives and flavorings. Each cigarette brand has its own ratio of filler.
For instance, high filler content makes a less compact cigarette with an insignificantly lower tar release. Additives are applied to make cigarettes more pleasing to the consumer.
Additives consist of moisturizers that are used to prolong shelf life; sugars to make the smoke be smoother and easier to inhale; and flavorings that exist in many varieties. Some of the elements may seem to be harmless in their natural form and other may be toxic while mixed with other materials.
The nicotine and tar delivery can as well be changed by the type of paper that is used in the cigarette. More poriferous paper will let air into the cigarette, attenuating the smoke and lessening the amount of tar and nicotine.
Filters are made of cellulose acetate and trap some of the tar and smoke particles issued from the inhaled smoke. Filters as well cool the smoke slightly, making it easier to inhale. They were added to cigarettes in the 1950s, in response to the first reports that smoking was hazardous to health. Tobacco companies claimed that their filtered brands had lower tar than others and encouraged consumers to believe that they were safer.
Tobacco smoke comprises “sidestream smoke” that is resulted from the burning tip of the cigarette and “mainstream smoke” that is obtained from the filter.
Tobacco smoke contains many different substances that are released into the air as particles and gases.