When processed tobacco leaf arrives at the factory, it is checked for quality and carefully blended with other tobacco and any ingredients that the brand recipe may call for, such as flavourings that balance the taste.
Keeping track of the various types of tobacco and blend components in use is a highly technical process and computers track production runs. Moisture content is also crucial. Too dry and the tobacco leaf will crumble; too moist and it may spoil during storage. The blended tobacco is treated with just the right amount of steam and water to make it supple and is then cut into the form used in cigarettes. Excess moisture is then removed so the cut tobacco can be given a final blending and quality check.
The technology has advanced dramatically over the years. Cigarette making, once done entirely by hand, is now almost fully automated, with the cut tobacco, cigarette paper and filters continuously fed into the cigarette-making machines. Quality is a top priority. Each cigarette is automatically quality controlled to ensure that it meets every aspect of its specification.
Packing machines put them into the familiar brand packs, wrap the packs in protective film and group them into cartons and cases. There is more testing at each stage to make sure the cigarettes are properly protected before the completed cases are ready for distribution.