Abstract: A duplex printing system and method of configuring the same are described. In examples, an image, such as a test pattern, on one side of a print substrate is printed to be out of phase with an image, such as a test pattern, on the other side of the print substrate. This is achieved by adjusting a configuration of a print buffer that is located between first and second print engines of the duplex printing system. In particular examples, a length of a web within the print buffer is controlled such that the images are out of phase.

Abstract: A duplex printing system and method of configuring the same are described. In examples, an image, such as a test pattern, on one side of a print substrate is printed to be out of phase with an image, such as a test pattern, on the other side of the print substrate. This is achieved by adjusting a configuration of a print buffer that is located between first and second print engines of the duplex printing system. In particular examples, a length of a web within the print buffer is controlled such that the images are out of phase.

Abstract: A printer control system (101) comprising a processor (104) and processor accessible memory (103), the processor (104) being adapted to control the memory (103) to store a concordance between substrate identities for different identified substrates and print control data to be used by the print control system (101) in controlling a printer to control colour and/or quality when printing upon identified substrates, the processor (104) being adapted to associate at least one first identified substrate with the same print control data used for a second, different, identified substrate.