Abstract
The temperature of the mainstream smoke, measured in the cigarette butt, is practically not influenced by differences in brand, type, equipment or position of the cigarette during smoking. During the process of smoking the average temperature in the butt equals the average room temperature and does hardly exceed 30°C provided that a butt length of about 23 mm is left. If smoking is continued to shorter butts radiant heat from the glowing zone can bring the temperature up to a maximum of 75°C within a range of 0.5 cm.