Abstract

A lithographic printing plate precursor including a support and a coating comprising a photopolymerizable layer including a polymerisable compound, optionally a sensitizer, a photoinitiator and discrete particles which comprise a plurality of silane groups, and/or silanol groups and/or siloxane reaction products of said silane and/or silanol groups.

IPC Classes  ?

• G03F 7/075 - Silicon-containing compounds
• G03F 7/16 - Coating processesApparatus therefor
• G03F 7/30 - Imagewise removal using liquid means

Abstract

A lithographic printing plate precursor is disclosed including a support and a coating comprising (i) a photopolymerisable layer including a polymerisable compound and a photoinitiator, and a toplayer provided above the photopolymerisable layer;characterized in that the toplayer includes a hydrophobic binder, and hydrophobic discrete particles having a melting and/or softening temperature above 50° C.

IPC Classes  ?

• B41C 1/10 - Forme preparation for lithographic printingMaster sheets for transferring a lithographic image to the forme
• G03F 7/033 - Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers

Abstract

A method for setting up a lithographic printing press is provided which reduces the make-ready time of on-press developable printing plates so that less copies are wasted. The method uses an ‘ink boost’ at the startup of the press by presetting the inking system to a configuration whereby the amount of ink supplied to the plate is different from the amount prescribed by standard printing conditions. The ink boost can be positive or negative and can be made dependent on the difference in the image coverage between plates used in successive print jobs or on different paper types used in successive print jobs.

IPC Classes  ?

• B41F 33/00 - Indicating, counting, warning, control or safety devices
• B41C 1/10 - Forme preparation for lithographic printingMaster sheets for transferring a lithographic image to the forme

Abstract

Rendering a color separation wherein diluted digital images are obtained wherefrom consecutive strips are generated having an overlap and wherein the non-overlap zones and overlap zones are halftoned to obtain non-aligned halftone rasters which are then transferred to a print controller of a digital printer for printing the color separation.

IPC Classes  ?

• G06K 15/10 - Arrangements for producing a permanent visual presentation of the output data using printers by matrix printers
• H04N 1/405 - Halftoning, i.e. converting the picture signal of a continuous-tone original into a corresponding signal showing only two levels
• H04N 1/60 - Colour correction or control
• B41J 2/21 - Ink jet for multi-colour printing

Abstract

A lithographic printing plate precursor including a support and a coating comprising a photopolymerizable layer including a polymerisable compound, optionally a sensitizer, a photoinitiator and discrete particles which comprise a plurality of silane groups, and/or silanol groups and/or siloxane reaction products of said silane and/or silanol groups.

IPC Classes  ?

• B41C 1/10 - Forme preparation for lithographic printingMaster sheets for transferring a lithographic image to the forme
• G03F 7/004 - Photosensitive materials
• G03F 7/027 - Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
• G03F 7/033 - Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
• G03F 7/075 - Silicon-containing compounds
• G03F 7/30 - Imagewise removal using liquid means

Abstract

A method for enhancing color consistency between batches of printed objects representing a same image by using a master output profile, having a master color gamut, with master color characterizing setting wherein said setting is also used for the batch output profile, having a batch color gamut. The image is converted between said master color gamut and the said batch color gamut.

IPC Classes  ?

• H04N 1/60 - Colour correction or control

Abstract

A lithographic printing plate precursor is disclosed including a support and a coating comprising (i) a photopolymerisable layer including a polymerisable compound and a photoinitiator, and a toplayer provided above the photopolymerisable layer;characterized in that the toplayer includes a hydrophobic binder, and hydrophobic discrete particles having a melting and/or softening temperature above 50°C.

IPC Classes  ?

• B41C 1/10 - Forme preparation for lithographic printingMaster sheets for transferring a lithographic image to the forme

Abstract

A method for setting up a lithographic printing press is provided which reduces the make-ready time of on-press developable printing plates so that less copies are wasted. The method uses an 'ink boost' at the startup of the press by presetting the inking system to a configuration whereby the amount of ink supplied to the plate is different from the amount prescribed by standard printing conditions. The ink boost can be positive or negative and can be made dependent on the difference in the image coverage between plates used in successive print jobs or on different paper types used in successive print jobs.

IPC Classes  ?

• B41F 33/00 - Indicating, counting, warning, control or safety devices

Abstract

A lithographic printing plate precursor including on a substrate which has a hydrophilic surface or which is provided with a hydrophilic layer, a coating comprising a photopolymerisable layer including a polymerisable compound, a photoinitiator and an adhesion promoting compound containing at least one thiol group and at least one group capable of adhering to the substrate.

IPC Classes  ?

• B41C 1/10 - Forme preparation for lithographic printingMaster sheets for transferring a lithographic image to the forme
• G03F 7/004 - Photosensitive materials

Abstract

A lithographic printing plate precursor is disclosed including a support and a coating comprising a photopolymerisable layer including a polymerisable compound and a photoinitiator, characterized in that the coating comprises a hydrophilic adhesion promoting copolymer including at least one monomeric unit according to Formula I and at least one monomeric unit according to Formula II; and at least one group and/or moiety including a phosphor atom.

IPC Classes  ?

• B41C 1/10 - Forme preparation for lithographic printingMaster sheets for transferring a lithographic image to the forme
• G03F 7/00 - Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printed surfacesMaterials therefor, e.g. comprising photoresistsApparatus specially adapted therefor
• G03F 7/033 - Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
• G03F 7/085 - Photosensitive compositions characterised by adhesion-promoting non-macromolecular additives
• G03F 7/11 - Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
• G03F 7/30 - Imagewise removal using liquid means

Abstract

A lithographic printing plate precursor is disclosed including on a support a coating comprising (i) a photopolymerisable layer including a polymerisable compound, a first infrared absorbing dye including at least one electron withdrawing substituent and a photoinitiator; and (ii) a toplayer provided above the photopolymerisable layer which includes a second infrared absorbing compound which includes a thermocleavable group which transforms into a group which is a stronger electron-donor upon exposure to heat and/or IR radiation, and is capable of forming a print-out image upon exposure to heat and/or IR radiation.

IPC Classes  ?

• B41C 1/10 - Forme preparation for lithographic printingMaster sheets for transferring a lithographic image to the forme

Abstract

A lithographic printing plate precursor is disclosed including a support and a coating comprising (i) a photopolymerisable layer including a polymerisable compound, a photoinitiator and an asymmetrically substituted infrared absorbing compound.

IPC Classes  ?

• B41C 1/10 - Forme preparation for lithographic printingMaster sheets for transferring a lithographic image to the forme

Abstract

A lithographic printing plate precursor is disclosed including a support and a coating comprising a photopolymerisable layer including a polymerisable compound, a photoinitiator, and an infrared absorbing compound including a long chain linear or branched alkyl group.

IPC Classes  ?

• B41C 1/10 - Forme preparation for lithographic printingMaster sheets for transferring a lithographic image to the forme

Abstract

A lithographic printing plate precursor is disclosed which comprises a support, a photopolymerizable image recording layer and an overcoat which comprises a low-molecular radical inhibitor. After image-wise exposure, the plate is heated whereby the radical inhibitor diffuses from the overcoat to the image recording layer, resulting in an increase of the daylight stability of the exposed and heated precursor. Such plate is especially suitable for on-press processing.

IPC Classes  ?

• B41C 1/10 - Forme preparation for lithographic printingMaster sheets for transferring a lithographic image to the forme
• G03F 7/11 - Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having cover layers or intermediate layers, e.g. subbing layers
• G03F 7/027 - Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
• G03F 7/031 - Organic compounds not covered by group
• G03F 7/09 - Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
• G03F 7/30 - Imagewise removal using liquid means
• G03F 7/38 - Treatment before imagewise removal, e.g. prebaking

Goods & Services

Chemicals used in industry and, in particular, chemicals for the graphic arts. Printing plates, printing machines and machine tools, matrices, cylinders, presses and rollers for use in printing.