Abstract:
A heat-sensitive lithographic printing plate precursor is disclosed which comprises a hydrophilic support and a coating provided thereon, wherein the coating comprises an infrared absorbing dye and is optimised for producing a minimum extent of ablation when exposed to high power infrared laser light.
Abstract:
A method of making a lithographic printing plate comprising the steps of: a) providing a lithographic printing plate precursor comprising (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on said support, comprising a photopolymerizable layer, and, optionally, an intermediate layer between the photopolymerizable layer and the support,
wherein said photopolymerizable layer comprises a polymerizable compound, a polymerization initiator and a reactive binder, b) image-wise exposing said coating in a plate setter, c) optionally, heating the precursor in a preheating unit, d) developing the precursor off-press in a gumming unit by treating the coating of the precursor with a gum solution, thereby removing the non-exposed areas of the photopolymerizable layer from the support,
whereby said reactive binder is a polymer containing a monomeric unit which comprises a group having an ethylenically unsaturated bond.
Abstract:
A non-aqueous pigment dispersion comprising a diketopyrrolo-pyrrole pigment, a polymeric dispersant and a dispersion synergist in a dispersion medium characterized in that the dispersion synergist is a diketopyrrolo-pyrrole derivative containing at least one carboxylic acid group or a salt thereof. A method for printing an ink-jet image is also disclosed.
Abstract:
A method of making a lithographic printing plate comprising the steps of: a) providing a lithographic printing plate precursor comprising (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on said support, comprising a photopolymerizable layer and, optionally, an intermediate layer between the photopolymerizable layer and the support, wherein said photopolymerizable layer comprises a polymerizable compound, a polymerization initiator and a binder, and
b) image-wise exposing said coating in a plate setter, c) heating the precursor in a preheating unit, d) treating the precursor in a gumming station, comprising at least a first gumming unit, by applying a gum solution to the coating of the precursor, thereby removing the non-exposed areas of the photopolymerizable layer from the support, and
wherein the steps (c) and (d) are carried out off-press in said preheating unit and said first gumming unit, and wherein said preheating unit and said first gumming unit are coupled to each other by mechanical plate conveying means or are integrated in a single apparatus.
Abstract:
A method of making a lithographic printing plate comprising the steps of: a) providing a lithographic printing plate precursor comprising (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on said support, comprising a photopolymerizable layer, and, optionally, an intermediate layer between the photopolymerizable layer and the support,
wherein said photopolymerizable layer comprises a polymerizable compound, a polymerization initiator and a reactive binder, b) image-wise exposing said coating in a plate setter, c) optionally, heating the precursor in a preheating unit, d) developing the precursor off-press in a gumming unit by treating the coating of the precursor with a gum solution, thereby removing the non-exposed areas of the photopolymerizable layer from the support,
whereby said reactive binder is a polymer containing a monomeric unit which comprises a group having an ethylenically unsaturated bond.
Abstract:
A radiation-curable ink-jet black ink comprising a black pigment, at least one colour pigment and at least one radiation-curable compound is disclosed. An ink-jet ink set comprising the radiation-curable ink-jet black ink and a process for printing with such an ink-jet ink set are also disclosed. Image quality defects of noticeable chromatic variation in adjacent print patches of bi-directional printing are eliminated and reduced ink consumption is observed.
Abstract:
The invention provides a method and apparatus for aligning the printing of dots generated by at least one array of printing elements in an printing apparatus. The method includes the steps of printing a calibration test pattern, scanning the printed calibration test pattern, determining at least one calibration value based on the scanned calibration test pattern, positioning an alignment adjustment tool relative to the array of printing elements of which the alignment needs to be adjusted and, based on the calculated calibration value, automatically adjusting the alignment of the array of printing elements using the alignment adjustment tool.