Abstract: The optical density of a first primary color is determined using two test patches. The first patch is printed with only the first primary color and a second primary color. The second patch is printed using the first primary color and a second primary color. The optical density of both patches is measured. The optical density of the first primary color is determined using the measured optical density of the second primary color and the measured optical density of the first patch.

Abstract: The optical density of a first primary color is determined using two test patches. The first patch is printed with only the first primary color and a second primary color. The second patch is printed using the first primary color and a second primary color. The optical density of both patches is measured. The optical density of the first primary color is determined using the measured optical density of the second primary color and the measured optical density of the first patch.

Abstract: A method of calibrating a printer is disclosed. The printer prints a plurality of patches using know color values. At least two patches of each color are printed. The patches are measured to determine a measured color value for each patch. The measured color values are checked for validity. The printer is calibrated using only the valid measured color values.

Abstract: Techniques related to color analysis are disclosed herein. In an example, substrate locations on a printed pattern are selected based on a set of measurements related to substrate-height. Further, color of the printed pattern is determined at the selected locations.

Abstract: An ink patch is printed on a swath of media, by an inkjet-printing mechanism of an inkjet-printing device. Printing the ink patch takes a first length of time. The ink patch printed on the swath is heated at a first temperature less than a second temperature specified for the first length of time the inkjet-printing mechanism takes to print the ink patch. A second length of time is waited. A total length of time the swath is heated is at least substantially equal to the first length of time plus the second length of time.

Abstract: Method of computing a convex hull in a predetermined color space, comprising determining a print attribute value range pertaining to a reference print attribute value, selecting base NP (Neugebauer Primary) area coverages, comprising area coverages of single NPs and combined NPs, having print attribute values in the print attribute value range, printing and measuring patches corresponding to the base NP area coverages, computing linear combinations of the base NP area coverages, and assigning one of the base NP area coverage or the linear combination of base NP area coverages to the corresponding color, depending on which is closest to the reference print attribute value.

Abstract: An ink patch is printed on a swath of media, by an inkjet-printing mechanism of an inkjet-printing device. Printing the ink patch takes a first length of time. The ink patch printed on the swath is heated at a first temperature less than a second temperature specified for the first length of time the inkjet-printing mechanism takes to print the ink patch. A second length of time is waited. A total length of time the swath is heated is at least substantially equal to the first length of time plus the second length of time.

Abstract: The invention relates to a color printing device, whereby the color printing device comprises a reciprocating color measurement device and a reciprocating optical density sensor, to a mobile carriage comprising a color printhead, a color measurement device and an optical density sensor and to a color measurement method comprising the following steps: identify the position of a pattern on a two-dimensional media using a mobile optical density sensor; derive the position of a color patch on the media from the position of the pattern; measure the color of the color patch using a color measurement device.

Abstract: Method of computing a convex hull in a predetermined color space, comprising determining a print attribute value range pertaining to a reference print attribute value, selecting base NP (Neugebauer Primary) area coverages, comprising area coverages of single NPs and combined NPs, having print attribute values in the print attribute value range, printing and measuring patches corresponding to the base NP area coverages, computing linear combinations of the base NP area coverages, and assigning one of the base NP area coverage or the linear combination of base NP area coverages to the corresponding color, depending on which is closest to the reference print attribute value.

Abstract: A printer is configured to print a color target that associates colors to which humans are most sensitive to color variance with areas of the color target within which color measurement is less prone to meassurement error. The printer then prints the color target according to the association. In an optional impemementation, measurements of like color elements within the target are average. In a further optional impementation, the averaging is performed using weighted values, wherein the weighting is based on color measurement accuracy within an area within the color target wherein each measured element is located. In a still further implementation, a color look-up table is generated according to measurements made of the color target.

Abstract: In one embodiment, a print system includes an anticipated ambient lighting selector to allow selection of an anticipated ambient lighting. A rendering module is configured to map a print job into raster data configured to reduce color cast in gray output when displayed under the anticipated ambient lighting.

Abstract: The invention relates to a color printing device, whereby the color printing device comprises a reciprocating color measurement device and a reciprocating optical density sensor, to a mobile carriage comprising a color printhead, a color measurement device and an optical density sensor and to a color measurement method comprising the following steps: identify the position of a pattern on a two-dimensional media using a mobile optical density sensor; derive the position of a color patch on the media from the position of the pattern; measure the color of the color patch using a color measurement device.

Abstract: A printer is configured to print a color target that associates colors to which humans are most sensitive to color variance with areas of the color target within which color measurement is less prone to meassurement error. The printer then prints the color target according to the association. In an optional impemementation, measurements of like color elements within the target are average. In a further optional impementation, the averaging is performed using weighted values, wherein the weighting is based on color measurement accuracy within an area within the color target wherein each measured element is located. In a still further implementation, a color look-up table is generated according to measurements made of the color target.

Abstract: An ink kit for a printer device comprises: at least one print head capable of connecting with an ink supply tube of said printer device; at least one ink reservoir capable of connecting with said ink supply tube; and a pump device capable of connecting with said at least one ink supply tube of said printer device, for clearing said at least one ink supply tube of ink.

Abstract: In one embodiment, a print system includes an anticipated ambient lighting selector to allow selection of an anticipated ambient lighting. A rendering module is configured to map a print job into raster data configured to reduce color cast in gray output when displayed under the anticipated ambient lighting.