Abstract: Treating cigarette paper with (1) binary combinations of the sodium and potassium salts of a carboxylic acid or (2) binary combinations of an alkali metal chloride and an alkali metal carboxylate provides a means of controlling the static burning rate of cigarettes wrapped in these papers. Burn rate control is functionally implemented by varying (1) the sodium to potassium cation ratio at constant total alkali metal cation weight for the former binary combination and (2) the ratio of the alkali metal cation from the chloride to the alkali metal cation from the carboxylate at constant total alkali metal cation weight for the latter binary combination. This means of burn rate control is effective for cigarette papers containing various inorganic fillers and weighing less then 25 g/m.sup.2 to over 45 g/m.sup.2.

Abstract: A smoking article wrapper which when combined with a suitable tobacco column produces up to 75% less particulate sidestream smoke than do prior art cigarette paper wrappers and to methods of producing same. The paper conains freshly precipitated magnesium hydroxide filler precipitated by an equal or near equal stoichiometric addition rate process in the presence of the particulate magnesium hydroxide and/or calcium co-filler(s) and in the absence of the cellulosic pulp fibers.

Abstract: A cigarette paper which when fabricated into a cigarette with a suitable tobacco column produces up to 80% less particulate sidestream smoke than do cigarettes fabricated with conventional cigarette paper wrappers. This reduction of sidestream smoke is accomplished by incorporation of a mixture of freshly precipitated and particulate magnesium hydroxides in the cigarette paper sheet as paper fillers. The high percentage reductions in sidestream particulate smoke are obtained when the median particle size of the particulate magnesium hydroxide filler is relatively large, e.g., 15 micrometers.

Abstract: A wrapper for smoking articles such as cigarettes, cigars and the like containing at least 15% by weight magnesium oxide or its hydrate and at least 0.5% by weight of a specific chemical adjuvant such as the alkali metal acetates, carbonates, citrates, nitrates or tartrates. The combination of magnesium oxide or its hydrate with any of the chemical adjuvants significantly reduces visible sidestream smoke that emanates during static burning from smoking articles employing the wrapper. The wrapper may comprise conventional cigarette paper with magnesium oxide and the adjuvant incorporated therein as the filler in the paper furnish or either or both of the additives may be applied to the paper as a coating. Wrappers containing the additives can be used in place of conventional wrappers for smoking articles or used as an inner wrapper for the tobacco column in combination with a conventional outer wrapping of cigarette paper or cigar wrap.

Abstract: An improved ventilated filter tip cigarette is provided utilizing a unique combination of porous filter plug wrap having a porosity of from about 300 to 4000 Filtrona air permeability units with a microperforated tipping envelope having perforations averaging less than about 0.01 mm.sup.2 each in open area. The relationship of plug wrap porosity combined with the size of microperforations in the tipping envelope provide cigarettes with maximum selective reductions in carbon monoxide yields and only minor reductions in nicotine yields as compared to constituent yields heretofore obtained in the smoke from ventilated cigarettes.