The composition of the tobacco products include tobacco, paper, filter materials and additives. The cellulose acetate contained in the filter is a fibre that is produced from wood pulp. Initially the filter material arrives in a form of a long band of about 10,000 fibres pressed in huge 750 kg bundles. This bundle is stretched to open the fibres up and then is sprayed with a special softener to join them together, wrapped with paper, cut and placed into cigarette-making machine.
The design of the filter can be different, for instance by making some holes, by changing its length or compactness and also by the material used. All the above mentioned variations can affect the level of filtration, the taste of cigarette smoke and the smoking experience itself. Charcoal is sometimes combined with the cellulose acetate, as its absorption properties can decrease some of the gas ingredients in smoke. It is generally used in a filter with two sections: a white cellulose acetate at the end of the cigarette and a section that has been sprayed with charcoal. As charcoal is mostly an elemental carbon, these are sometimes known as carbon filters.
The process of making holes in the filter is known as filter ventilation, which is used to decrease a cigarette’s yield and tobacco strength. These holes mix the smoke with air, reducing the level smoke produced in each puff. Filter ventilation is essential in decreasing smoke gases that are not maintained in the filter.
The paper used around the tobacco rod can also be wrapped around the filter zone. The porous structure of the paper will let the air pass through it and thus make the taste and cigarette strength milder. The more air passes through the paper, the lighter and softer the smoke is.
One more feature to diversify the taste, strength and smoke delivery is hidden in the use of expanded tobacco lamina, also known as Dry Ice Expanded Tobacco.
Each cigarette brand goes through a unique production process, which includes special recipe, paper, filter, the particular ventilation and of course peculiar tipping and package design.
All equipment is fixed to guarantee product correspondence. The cigarette recipe is set to a cigarette making machine, which quickly wraps the tobacco in a qualitative paper to form a rod, which is afterwards cut to a particular length and united with the filter in order to make a cigarette ready for being packed.
By Clark Moore, Staff Writer
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