Improvements relating to smoking articles.

摘要

The invention relates to low delivery cigarettes, usually having a mainstream particulate matter delivery of about 9mg or less. The cigarettes(1) comprise a rod (2) of tobacco material and a filter element (3). The filter element (3) comprises an alkali filter material section (4) having a loading level of less than 12% by weight of the section. The characteristics of the cigarettes (1) are arranged so that, when smoked, the alkaline filter material is exposed to an amount of smoke acceptable to achieve an increased perception of smoke impact. This is usually achieved by using a low particulate matter potential rod. In this way the moisture free dry particulate matter (NFDPM) to nicotine ratio is decreased compared with control cigarettes having the same cigarette characteristics without the addition of alkaline filter material to the filter element. <IMAGE>