Method for processing press sheets for printed products

A method for processing press sheet for book blocks, comprising producing on a press sheet at least one first double slot perforation line and at least one second double slot perforation line each comprising one first and second perforation line formed from a plurality of slots of the same slot length, wherein the slots of the first and second perforation lines of each of the first and second double slot perforation lines are produced in the press sheet in such a manner that two consecutive slots of each first and second perforation line have a distance of one slot length from each other, that the first and second perforation line are arranged in relation to each other so that the first and second perforation lines extend in parallel and spaced relation to each other and have a longitudinal offset of one slot length to each other, so that the slots of the first perforation line are arranged staggered to the slots of the second perforation line and that a folding line is formed between the first and second perforation line, wherein the at least one first double slot perforation line including a first folding line extends in a lengthwise direction of the press sheet and the at least one second double perforation line including a second folding line extends in a crosswise direction of the press sheet and that the alignment of the first and second double slot perforation lines in relation to each other is such that the first folding line of the first double slot perforation line extends between the slot end of a first slot of the first perforation line of the second double slot perforation line and the slot beginning of a second slot of the second perforation line of the second double slot perforation line, wherein the second slot directly follows the first slot.