Wrappers for smoking articles

A paper wrapper for a smoking article, the paper wrapper having a basis weight that is less than about 40 grams per square meter, the paper wrapper including a first weak organic acid or acidic salt of the first weak organic acid, wherein the acidic salt of the first weak organic acid comprises a calcium salt of the first weak organic acid, and a second organic acid or salt of the second organic acid, the first weak organic acid being a monoprotic acid having a pKa greater than 4.2 or a polyprotic acid having a pKa1 greater than 4.2, the first weak organic acid including at least four carbons, and the second organic acid being a monoprotic acid having a pKa of 4.2 or less or a polyprotic acid having a pKa1 of 4.2 or less, the paper wrapper having an initial porosity of greater than 40 Coresta units, wherein a film-forming composition is applied to all or a portion of the paper wrapper, wherein the paper wrapper further includes a burn promoting agent or a burn control additive, further wherein the paper wrapper includes an upper layer and a lower layer, wherein the lower layer includes a crosslinked polymer film of the film-forming agent and the upper layer includes a higher proportion of each of the film-forming agent, the first weak organic acid and/or salt thereof, and the second organic acid and/or salt thereof than the lower layer.