A process for the manufacture of sack paper, sack paper and paper bags

The invention relates to a process for the preparation of buckled or the uncompressed sack paper, wherein the web (2) is produced in a paper machine (3), which includes the headbox onto a wire, the dewatering in a press and the drying in a drying section, and is then wound by a winding (8). The invention further relates to a paper bag, which was prepared by the method, and a paper bag out of the bag produced by the process of paper. In order to improve the printability, the web (2) in a nip calender at the end of or after the paper machine (3) (12) is treated.