| Patent application number | Description | Published |
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| 20090246701 | METHOD FOR PREPARING LITHOGRAPHIC PRINTING PLATE - A method for preparing a lithographic printing plate includes: exposing a lithographic printing plate precursor including a hydrophilic support, a photosensitive layer containing (A) a sensitizing dye having an absorption maximum in a wavelength range of from 350 to 450 nm represented by the formula (I) or (II) as defined herein, (B) a polymerization initiator, (C) a polymerizable compound and (D) a binder polymer and a protective layer in this order with laser of from 350 to 450 nm; and removing the protective layer and an unexposed area of the photosensitive layer in the presence of a developer having pH of from 9 to 11 and containing an alkali agent, a surfactant and a water-soluble polymer compound by an automatic processor. | 10-01-2009 |
| 20100055615 | METHOD OF PREPARING LITHOGRAPHIC PRINTING PLATE - A method for preparing a lithographic printing plate, includes: exposing imagewise a lithographic printing plate precursor including a hydrophilic support and an image-recording layer containing a sensitizing dye, a polymerization initiator, an addition polymerizable compound having an ethylenically unsaturated double bond and a binder polymer; and processing the imagewise exposed lithographic printing plate precursor in a state where the imagewise exposed lithographic printing plate precursor is immersed in a developing tank holding an aqueous solution having pH of 8.5 to 10.8 and containing a low molecular weight hydroxycarboxylate ion, a pH buffer agent and a surfactant with circulation of the aqueous solution between the developing tank and an external tank provided outside a processing path line including the developing tank so as to keep constant a liquid level of the aqueous solution in the developing tank. | 03-04-2010 |
| 20110020757 | METHOD OF PREPARING LITHOGRAPHIC PRINTING PLATE - To provide a method of preparing a lithographic printing plate which is safe, exhibits excellent developing property and processing ability, and enables processing with one solution by processing after image exposure, a negative lithographic printing plate precursor having an image-recording layer containing (i) a sensitizing dye, (ii) a photopolymerization initiator, (iii) an addition polymerizable compound having an ethylenically unsaturated double bond, and (iv) a binder polymer on a hydrophilic support with an aqueous solution containing a carbonate ion, a hydrogen carbonate ion and a water-soluble polymer compound. | 01-27-2011 |
| 20110146516 | METHOD OF PREPARING LITHOGRAPHIC PRINTING PLATE - According to a method of preparing a lithographic printing plate substantially comprising a step of imagewise exposing a negative lithographic printing plate precursor having an image-recording layer containing (i) a sensitizing dye, (ii) a photopolymerization initiator, (iii) an addition polymerizable compound having an ethylenically unsaturated double bond and (iv) a binder polymer on a support and a step of processing the exposed lithographic printing plate precursor with an aqueous solution containing a carbonate ion, a hydrogen carbonate ion and a surfactant, the processing property is improved, a printing plate free from the tackiness on the surface thereof can be provided, even when the printing plate is stored after the development until printing, deterioration of the printing durability does not occur, and it becomes possible to conduct one solution development with a weak alkaline processing solution. | 06-23-2011 |
| Patent application number | Description | Published |
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| 20080241393 | METHOD FOR MAKING POSITIVE PHOTOSENSITIVE PLANOGRAPHIC PRINTING PLATE - A method for making a positive photosensitive planographic printing plate including of a base having formed thereon in this order an undercoat layer and an image recording layer, wherein the undercoat layer is obtained by applying an undercoat layer solution containing a solvent and an acrylic resin having an alkali-soluble group, followed by drying the coating, the image recording layer contains a novolac resin and an infrared absorbing agent, and the applied undercoat layer solution is dried in an undercoat layer drying step which includes a steam-containing hot air drying step using steam-containing hot air having a temperature of 90° C. to 200° C., and a relative humidity of 8% to 70%. | 10-02-2008 |
| 20090246702 | METHOD FOR PREPARING LITHOGRAPHIC PRINTING PLATE - A method for preparing a lithographic printing plate includes: exposing a lithographic printing plate precursor including a hydrophilic support, a photosensitive layer containing (A) a sensitizing dye having an absorption maximum in a wavelength range of from 350 to 450 nm represented by the formula (I) as defined herein, (B) a polymerization initiator, (C) a polymerizable compound and (D) a binder polymer and a protective layer in this order with laser of from 350 to 450 nm; and removing the protective layer and an unexposed area of the photosensitive layer in the presence of a developer having pH of from 9 to 11 and containing a carbonate ion, a hydrogen carbonate ion, a surfactant and a water-soluble polymer compound by an automatic processor. | 10-01-2009 |
| 20100047537 | METHOD OF PRODUCING LITHOGRAPHIC PRINTING PLATE - The present invention provides a method for producing a safe lithographic printing plate that exhibits an excellent developability and an excellent processing performance. The present invention also provides a method for producing a lithographic printing plate which enables single liquid processing and in which the obtained plate does not exhibit an impaired printing durability, does not exhibit a decline in printing durability even when the printing plate is stored after development before printing, and can inhibit the appearance of fingerprint scumming. A method of producing a lithographic printing plate is provided comprising: imagewise photoexposing a negative-working lithographic printing plate precursor that has an image-recording layer containing the (i), (ii), (iii), and (iv) described below on a hydrophilic support; and treating thereafter the imagewise-photoexposed negative-working lithographic printing plate precursor with an aqueous solution that has a pH of 8.5 to 10.8 and that contains a low molecular weight hydroxycarboxylic acid ion, a pH buffer, and a surfactant:
| 02-25-2010 |
