PROBLEM TO BE SOLVED: To provide a method for producing tissue paper that has high permeability, such a level of paper strength (tensile strength or the like) as not to be torn in use, and low basis weight.SOLUTION: The method for producing the tissue paper is a method for producing tissue paper having a basis weight of 30 g/mor less by subjecting raw material slurry prepared from a raw material containing bleached softwood kraft pulp to paper making treatment, and drying the slurry. The method for producing the tissue paper uses raw material slurry that is prepared by adding a wet paper-reinforcing agent (a) comprising a cationic polymer having a cationic group to pulp slurry of bleached softwood kraft pulp at a 33 section, simultaneously adding a low-molecular dry paper-reinforcing agent (b) and a high-molecular dry paper-reinforcing agent (c) to the slurry, or adding the low-molecular dry paper-reinforcing agent (b) to the slurry at a 43 section and then further adding the high-molecular dry paper-reinforcing agent (c) to the slurry at a 65 section, as raw material slurry.【課題】透過性が高く、使用時に破れが生じない程度の紙強度(引張強度等)を有する低坪量の薄葉紙の製造方法を提供すること。【解決手段】本発明の薄葉紙の製造方法は、針葉樹晒クラフトパルプを含む原料から調整された原料スラリーを抄紙し乾燥して30g/m2以下の坪量の薄葉紙を製造する方法である。本発明の薄葉紙の製造方法は、原料スラリーとして、針葉樹晒クラフトパルプのパルプスラリーに、カチオン性基を有するカチオンポリマーからなる湿潤紙力剤(a)を添加33した後、低分子乾燥紙力剤(b)及び高分子乾燥紙力剤(c)を同時に添加して、又は低分子乾燥紙力剤(b)を添加43した後に更に高分子乾燥紙力剤(c)を添加65して調整された原料スラリーを用いる。【選択図】図1
