Instruction data is configured to include mode information indicating a print mode in download printing. The print mode includes a first mode and a second mode different from the first mode. The download printing includes: in response to extracting the mode information indicating the first mode, performing the download printing by the first mode, the first mode being a mode of, after completing reception of an entirety of a document, starting printing based on the entirety of the document; and in response to extracting the mode information indicating the second mode, performing the download printing by the second mode, the second mode being a mode of, before completing reception of the entirety of the document, starting printing based on a received portion of the document. The second mode is a mode in which reception of the document and printing based on the document are performed in parallel.

A method of processing print jobs on a printing substrate processing machine by using a computer, includes creating a data model for the computer with parameters for an unusable print/set-up time prediction on the basis of global print jobs and printing machine data, training the data model on the basis of global and/or local print jobs and printing machine data by using the computer, and defining ease-of-use criteria by an operator. The trained data model for the computer is used to predict the number of unusable prints during set up and set-up time of the printing substrate processing machine. The order of the processing of the print jobs is optimized on the basis of the predicted number of unusable prints during set-up and the predicted set-up time by using the computer.

An information processing device includes a controller. The controller acquires an appearance image configured of a plurality of colors, identifies the plurality of colors configuring the acquired appearance image, and specifying a plurality of printing medium types based on the plurality of identified colors. The plurality of printing medium types includes a first printing medium type and a second printing medium type. The controller generates a first print dataset and a second print dataset by using the appearance image. The first print dataset corresponds to the specified first printing medium type. The second print dataset corresponds to the specified second printing medium type.

Instruction data is configured to include mode information indicating a print mode in download printing. The print mode includes a first mode and a second mode different from the first mode. The download printing includes: in response to extracting the mode information indicating the first mode, performing the download printing by the first mode, the first mode being a mode of, after completing reception of an entirety of a document, starting printing based on the entirety of the document; and in response to extracting the mode information indicating the second mode, performing the download printing by the second mode, the second mode being a mode of, before completing reception of the entirety of the document, starting printing based on a received portion of the document. The second mode is a mode in which reception of the document and printing based on the document are performed in parallel.

A printing apparatus includes a head capable of discharging CMYK inks including a K ink, and a control unit configured to, based on image data to be printed, generate ink amount data for controlling an ink amount of each of the CMYK inks discharged by the head, and to control the head based on the ink amount data, wherein the control unit generates the ink amount data as ink amount data such that lightness of a composite color at least does not increase in a direction from a freely-selected coordinate point toward a black point, the composite color being formed by the CMY inks excluding the K ink based on ink amount data of each of the CMYK inks corresponding to a coordinate on a straight line from the freely-selected coordinate point toward the black point in a predetermined hue range of a color gamut of a color space of the image data.

A print data editing device performs editing print data such that when dots constituting an input image represented by the print data are compared by units of columns before and after performing the editing, a coincidence is maximized when an image of each column in the input image after the editing is the same position as an image of the corresponding column in the input image before the editing or is shifted by a corresponding shift amount relative to the image of the corresponding column in the input image before the editing and an editing condition is met. The editing condition includes that an absolute value of at least one shift amount is one dot or greater, an absolute difference value for any two neighboring columns is one dot or less, and at least one absolute difference value for all possible combinations of two columns is less than one dot.

A print data editing device is configured to perform: editing print data such that when dots constituting an input image represented by the print data are compared by units of columns before and after the editing, a coincidence is maximized when an image of each column in the input image after the editing is the same position as an image of the corresponding column in the input image before the editing or is shifted by a corresponding shift amount in a sub-scanning direction relative to the image of the corresponding column in the input image before the editing. An absolute value of at least one of shift amounts for columns in the input image after the editing is one dot or greater. An absolute difference value for any two neighboring columns in a main scanning direction in the input image after the editing is one dot or less.

A generation unit, which is configured to process image data to generate print data for applying an ink and a reaction liquid such that the print data corresponds to respective passes, generates print data for the ink such that the ink is applied only in a pass of which the elapsed time after application of the reaction liquid to the print medium is equal to or longer than the first time and shorter than the second time. The first time is from the timing where the reaction liquid is applied to the print medium up to the timing where adjacent droplets of the applied reaction liquid come into contact with each other and coalesce to form a reaction liquid film. The second time is from the timing where the reaction liquid is applied to the print medium up to the timing where the formed reaction liquid film is dissolved.

A print system including a printing apparatus that prints an image on a sheet, a verification apparatus that verifies a sheet printed by the printing apparatus and an information processing apparatus. The information processing apparatus determines whether or not a device having a discharge tray is present between the printing apparatus and the verification apparatus, and in a case where it is determined that the device is present, controls to discharge a sheet printed in a sample printing to the discharge tray when a timing of the sample printing for a user to confirm printing on the sheet is during execution of a print job in which the printing apparatus and the verification apparatus are used.

A printer is caused to perform duplex printing by an information processing device in which an OS standard printing program is installed. When causing a printer connected to a PC to execute duplex printing based on a print instruction output from an editing application installed in the PC, an auxiliary program that supports the printer executes rotation processing of rotating an image of a page, which is required to be rotated, by 180° for intermediate data received from a general-purpose print program, executes rearrangement processing of rearranging a processing order from a page order to a print order for print data received from the general-purpose print program, according to a sheet conveying aspect of the printer, and transmits the print data after the rotation processing and the rearrangement processing from the PC to the printer.