A substrate for an inkjet printer is described herein. The substrate comprises a material selected to provide high contrast reflected light and having a print material receiving surface with a neutral response to the print material.

A marking system comprises a substrate having a surface coated with a color-triggering developer and a deactivating ink composition; and a marking composition comprising at least one color precursor. At least one “non-color developing portion” of the surface is coated with both the color-triggering developer and the deactivating ink composition, and at least one “color-developing portion” of the surface is coated with the color-triggering developer and is not coated with the deactivating ink composition. Color development occurs at the color-developing portion(s) and does not occur at the non-color developing portion(s) upon application of the marking composition to the surface of the substrate.

A gravure printing unit is provided by which substrate can be printed according to a gravure printing method. The gravure printing unit has a forme cylinder, which comprises, on its circumference, an image-forming pattern of recesses, and has an inking unit by which the pattern of recesses provided on the forme cylinder can be at least partially inked. The forme cylinder can be partially inked from an inking device via a first inking unit cylinder, which has, in the region of its lateral surface, recesses that correspond to recesses on the forme cylinder, and via a second inking unit cylinder, which is to be partially inked by the first inking unit cylinder. To produce an image element to be used for checking a relative position between the forme cylinder and the first inking unit cylinder, the forme cylinder has, within the printing width but preferably outside of an image-forming pattern of recesses that supplies the print image of one or more N-up copies, and lying in a circumferential region, at least one first recess, which overlaps on the forme cylinder only partially with a projection, which is obtained on the forme cylinder by the rolling off, in pairs in each case, of the inking unit cylinders that are involved in the ink transport, of a recess, which is provided in a defined position and location on the circumference of the first inking unit cylinder for the purpose of checking the relative position. A substrate section and a method for checking and/or adjusting and/or correcting a relative position between the first inking unit cylinder and the forme cylinder are also disclosed.

A gravure printing unit is provided by which substrate can be printed according to a gravure printing method. The gravure printing unit has a forme cylinder, which comprises, on its circumference, an image-forming pattern of recesses, and has an inking unit by which the pattern of recesses provided on the forme cylinder can be at least partially inked. The forme cylinder can be partially inked from an inking device via a first inking unit cylinder, which has, in the region of its lateral surface, recesses that correspond to recesses on the forme cylinder, and via a second inking unit cylinder, which is to be partially inked by the first inking unit cylinder. To produce an image element to be used for checking a relative position between the forme cylinder and the first inking unit cylinder, the forme cylinder has, within the printing width but preferably outside of an image-forming pattern of recesses that supplies the print image of one or more N-up copies, and lying in a circumferential region, at least one first recess, which overlaps on the forme cylinder only partially with a projection, which is obtained on the forme cylinder by the rolling off, in pairs in each case, of the inking unit cylinders that are involved in the ink transport, of a recess, which is provided in a defined position and location on the circumference of the first inking unit cylinder for the purpose of checking the relative position. A substrate section and a method for checking and/or adjusting and/or correcting a relative position between the first inking unit cylinder and the forme cylinder are also disclosed.

A method for manufacturing a decorative substrate for decorative panels may involve providing a master image. The master image may be printed on a first printable substrate using an inkjet printer, thereby obtaining a first decorative substrate. A printing defect may be evaluated in the first decorative substrate. An error correction operation may be performed on the master image on the basis of the evaluation. A corrected master image may be printed on a second printable substrate to obtain a second decorative substrate. The error correction operation may involve adding an intentional defect to the corrected master image.

A substrate for an inkjet printer is described herein. The substrate comprises a material selected to provide high contrast reflected light and having a print material receiving surface with a neutral response to the print material.

A substrate for an inkjet printer is described herein. The substrate comprises a material selected to provide high contrast reflected light and having a print material receiving surface with a neutral response to the print material.

Methods and systems for creating a gloss effect, can involve adjusting a color selected with a first RGB color value for a first pattern ink among a group of pattern inks to appear lighter and selecting a common geometric pattern for the group of pattern inks including the first pattern ink and a second pattern ink. A feature can be written with an object with a second RGB color value and a geometric pattern can be written opaquely on top of the selected common geometric pattern. The feature can be erased within the object with a third RGB color value. The feature can be then written with a fourth RGB color value. The geometric pattern can be then written opaquely on top of the feature in the color adjusted selected for the first pattern ink to create a gloss effect with the geometric pattern opaquely on top of the feature in the color adjusted selected for the first pattern ink which displays the feature.

Optical waveguides are formed based on measured parameters of an optical substrate. Regions for forming one or more optical elements are identified based on these measurements, and inkjet deposition is utilized to deposit a refraction-matched deposition material is applied to one or more identified regions to selectively modify the total thickness variation (TTV) in each such region. Prior to or subsequent to the deposition, optical gratings or other optical elements are formed within the adjusted regions.

For each individual correction area to be corrected so as to suppress image defects caused by dot missing in the printed image to be formed on the base material by the inkjet printing apparatus, it is determined whether or not to use a correction aid ink (white or transparent ink) for the correction of that individual correction area. A correction execution area is determined by removing pixel rows corresponding to a predetermined thinning number (e.g. one pixel row) from the opposite ends of an individual correction area determined to be corrected using the correction aid ink. The printing data is corrected such that a color ink is ejected in the correction executed area to form the printed image after the correction aid ink is ejected. Based on such corrected printing data, the printed image is formed on the base material.