Method and device for producing a printing forme and printing method

A method for producing printing formes which serve for printing of a substrate web with a seamless or transitionless, endless or format-variable print image in offset printing, comprising:

• for each printing color of the print image to be printed, dividing a total separation of the respective printing color over at least two printing formes such that, with a first printing forme a first part separation of the total separation of the respective printing color is printable onto the substrate web, and with a second printing forme a second part separation of the total separation of the respective printing color is printable onto the substrate web;
• wherein the total separation of the respective printing color is divided over the part separations such that:
• the substrate web in first portions is exclusively printable by the first part separation of the first printing forme;
• the substrate web in second portions is exclusively printable by the second part separation of the second printing forme;
• and
• the substrate web in third portions is printable by the first part separation of the first printing forme and by the second part separation of the second printing forme in an overlapping or overlaying manner.