The selection process of the tobacco is of great importance in order to maintain a constant level of quality, which is difficult to guarantee by tobacco growers since the tobacco is influenced by climate, time of harvest and curing process. The blenders form an important link between the tobacco growing and the actual production process since they are the people in the factory who determine what varieties and proportions of tobacco are to be processed to form a blend. The blenders combine the tobacco leaves to produce a consistent taste and quality. One tobacco blend can contain up to 20 types and grades of tobacco.