Abstract: A method for mounting a printing plate on a mounting sheet without requiring the intervention of a skilled person working by eye. An original design to be printed is produced on a computer and register marks are added to that design at specific positions. The resultant design data is output to a first printer. A negative of the design and the register marks is produced, and a printing plate is produced from the negative so that the design and the register marks are reproduced on the printing plate. The register mark position data is also output from the computer to a second printer. The dimensions of an article upon which the design is to be printed are input into a second printer and a full size plot of the outline of the article, including the positions of the register marks, is produced from the second printer.