The blend or mixture of tobacco is treated, during the primary process of manufacturing, with the correct amount of vapor and water in order to make it elastic and flexible and to be then cut in the form used for cigarettes. The humidity of the tobacco at this stage is very important: if it is very dry, the leaves will crumble and turn into dust, and if it is too damp, it will rot away in storage.
The process then continues in the packaging machines where the marked packages are wrapped with a protecting film and grouped in cartons and boxes. At this stage, additional controls are carried out to make sure the cigarettes are properly protected. Also, the package sealing is measured to ensure that the right content of humidity is preserved. The evaluation of the attributes of the carton, the package and the cigarettes guarantees that the consumer shall receive a product in compliance with the quality standards from the visual point of view.
The content of tar, nicotine, and carbon monoxide in the cigarette smoke is measured in a smoking machine, according to ISO regulations and ensuring compliance with what is specified for the product and the standing regulations in each market.