| 摘要 |
The object of the invention is to treat cigarette paper so as to improve fire safety, reduce offensiveness of the cigarette to the non-smoker, and for reducing the health hazard to the non-smoker. Cigarette paper is treated by one or the other of two alternative processes, The first alternative process is characterized by the step of coating between 40 and 100% of the surface area of the paper with an aqueous alkali metal silicate solution, the SiO<u2>u concentration of which range from between 12 and 16% for 40% coverage to between 7 and 15% for full coverage. The second alternative process is characterized by two sequential uniform coatings of an aqueous alkali metal silicate solution, the SiO<u2>u concentrations in each solution ranging from 1.7% to 6%. |
