Abstract: Herein, techniques are described for printing an image on a print media by operation of a printhead to eject a print fluid over the print media. In at least some examples, a printhead temperature parameter is acquired, the parameter being indicative of a temperature at the printhead during printing; alignment of the printhead is corrected based on the printhead temperature parameter; printing is performed on the print media via the printhead according to the corrected alignment.

Abstract: A printer control section arranged to control a printhead, is operable to cause the printhead to: perform a plurality of passes over a swath of a print medium, the plurality of passes including first and second treatment passes; apply treatment to the print medium in each of the treatment passes, the treatment in each treatment pass being applied according to a respective treatment mask, wherein each treatment mask indicates a corresponding set of pixels to which the treatment may be applied in a pass to which the treatment mask is applied, the treatment mask having a weight indicative of the proportion of pixels in the corresponding set of pixels, and the treatment masks of the first and second passes are such that a weight of the first treatment mask is different from a weight of the second treatment mask.

Abstract: In the field of printing technology, non impact printing methods such as inkjet printing may be used to deposit an ink composition onto print media to form an image. An ink composition typically comprises a colourant material and a vehicle, such as an aqueous solution, for delivering the colourant material to the print media. A wide range of such ink compositions is known in the industry. It is also known to use various pre-treatment compositions in combination with ink compositions in order to enhance the quality of a final image. Pre-treatment compositions are often substantially colourless liquid compositions that interact with elements of the ink composition to fix colourant to the print media. Pre-treatment compositions may help to improve image quality for example by reducing image bleeding, edge roughness and other image quality issues.

Abstract: According to one example, there is provided a method of controlling a printing system. The method comprises: obtaining a print job to print on a substrate; obtaining a value of a factor material to an undesirable condition occurring; determining a quantity of printing fluid to be deposited on a substrate when printing a portion of the print job; determining, based on the obtained value and the determined quantity of printing fluid to be deposited, whether the undesirable condition is likely to occur whilst printing the portion of the print job; and temporarily reducing the throughput of the printing system whilst printing the portion of the print job where it is determined that the undesirable condition is likely to occur whilst printing the portion of the print job.