Water-dispersible sheet and cigarette using the same

A water-dispersible sheet, comprising:

• a sheet produced through an impregnation treatment for a water-resolvable base paper with a coating mixture comprising:
• a water-soluble polymer which is a polymer that turns to a film by drying to reduce the air-permeability of the sheet selected from the group consisting of starch, starch derivatives, cellulose derivatives, polysaccharides, synthetic polymers, plant mucilage, microbial mucilage and protein, and
• an alkaline compound selected from the group consisting of hydroxides of alkali metals, carbonates and hydrogen carbonates of alkali metals, phosphates and hydrogenphosphates of alkali metals, hydroxides of alkaline earth metals and amines,
• wherein said water-resolvable base paper is made from a mixture of water-dispersible fibers and fibrous carboxymethyl cellulose acid or fibrous carboxyethyl cellulose acid, wherein the blend percentage of the fibrous carboxymethyl cellulose acid or fibrous carboxyethyl cellulose acid is from 1% to 50% weight of the whole amount of the fibrous raw materials, and the blend percentage of the water-dispersible fibers is from 30 to 99% weight of the whole amount of the fibrous raw materials for making base paper, and wherein a blend ratio of the water-soluble polymer to the alkaline compound is from 10:100 to 1000:100, and wherein a coating amount of the water soluble polymer is from 0.01 to 10 g/m.sup.2.