Patent application number | Description | Published |
20080199812 | Method for Making a Negative-Working Lithographic Printing Plate Precusor - A method for making a heat-sensitive negative-working lithographic printing plate precursor including the steps of
| 08-21-2008 |
20080254390 | Method of Making a Lithographic Printing Plate - A method of making a lithographic printing plate includes the steps of a) providing a lithographic printing plate precursor including (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on the support, including a photopolymerizable layer, a top layer, and optionally, an intermediate layer between the photopolymerizable layer and the support, wherein the photopolymerizable layer includes a polymerizable compound, a polymerization initiator, and a binder; b) image-wise exposing the coating in a plate setter; c) optionally, heating the precursor in a pre-heating unit; d) washing the precursor in a pre-washing station by applying water or an aqueous solution to the coating, thereby removing at least a portion of the top layer; and e) developing the precursor in a gumming station 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 gumming the plate in a single step. | 10-16-2008 |
20080254391 | Method of Making a Lithographic Printing Plate - A method of making a lithographic printing plate includes the steps of: a) providing a lithographic printing plate precursor including (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on the support including a photopolymerizable layer and, optionally, an intermediate layer between the photopolymerizable layer and the support, wherein the photopolymerizable layer includes a polymerizable compound, a polymerization initiator and a binder, b) image-wise exposing the coating in a plate setter, c) optionally, heating the precursor in a pre-heating unit, d) treating the precursor in a gumming station, including a first and at least a second gumming unit, wherein the precursor is consecutively developed in the first and the second gumming unit with a gum solution, thereby removing non-exposed areas of the photopolymerizable layer from the support and gumming the plate in a single step. | 10-16-2008 |
20080261154 | Method of Making a Lithographic Printing Plate - A method of making a lithographic printing plate includes the steps of a) providing a lithographic printing plate precursor including (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on the support including a photopolymerizable layer, and, optionally, an intermediate layer between the photopolymerizable layer and the support, b) image-wise exposing the coating in a plate setter, c) optionally, heating the precursor in a preheating unit, and 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 coating from the support, wherein the coating further includes a compound capable of interacting with the support, the compound being present in the photopolymerizable layer and/or in the intermediate layer. | 10-23-2008 |
20080274427 | Method of Making a Lithographic Printing Plate - A method of making a lithographic printing plate includes the steps of: a) providing a lithographic printing plate precursor comprising including (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on the support, including a photopolymerizable layer and, optionally, an intermediate layer between the photopolymerizable layer and the support, wherein the photopolymerizable layer includes a polymerizable compound, a polymerization initiator, and a binder, b) image-wise exposing the coating in a plate setter, c) heating the precursor in a pre-heating unit, d) treating the precursor in a gumming station, including 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 the pre-heating unit and the first gumming unit, and wherein the pre-heating unit and the first gumming unit are coupled to each other by a mechanical plate conveying device or are integrated in a single apparatus. | 11-06-2008 |
20080274428 | Method of Making a Lithographic Printing Plate - A method of making a lithographic printing plate includes the steps of: a) providing a lithographic printing plate precursor including (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on the support including a photopolymerizable layer, a top layer and, optionally, an intermediate layer between the photopolymerizable layer and the support, wherein the photopolymerizable layer includes a polymerizable compound, a polymerization initiator, and a binder, b) image-wise exposing the coating in a plate setter, c) optionally, heating the precursor in a pre-heating unit, and d) treating the precursor in a gumming station, the gumming station including a first and at least a second gumming unit, wherein the precursor is washed in the first gumming unit by applying a gum solution to the coating thereby removing at least a portion of the top layer, and wherein, subsequently, the precursor is developed in the second gumming unit with a gum solution thereby removing non-exposed areas of the photopolymerizable layer from the support and gumming the plate in a single step. | 11-06-2008 |
20080286695 | Method of Making a Lithographic Printing Plate - A method of making a lithographic printing plate includes the steps of: a) providing a lithographic printing plate precursor including (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on the support including a photopolymerizable layer and, optionally, an intermediate layer between the photopolymerizable layer and the support, wherein the photopolymerizable layer includes a polymerizable compound, a polymerization initiator and a binder, b) image-wise exposing the coating in a plate setter, c) heating the precursor in a pre-heating unit within a time period of less than 10 minutes after step (b), d) treating the precursor in a gumming station, including at least one gumming unit, whereby a gum solution is applied to the precursor, thereby removing non-exposed areas of the photopolymerizable layer from the support and gumming the plate in a single step. | 11-20-2008 |
20080307990 | Method of Making a Lithographic Printing Plate - A method of making a lithographic printing plate includes the steps of: a) providing a lithographic printing plate precursor including (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on the support including an imaging layer, and, optionally, an intermediate layer between the imaging layer and the support, wherein the imaging layer includes a switchable polymer, b) image-wise exposing the coating, whereby the polymer undergoes a chemical reaction induced by the exposing step thereby creating a lithographic image consisting of printing areas and non-printing areas wherein the non-printing areas are removable from the support by a gum solution, and c) developing the precursor by treating the coating of the precursor with the gum solution thereby removing the non-printing areas. | 12-18-2008 |
20080311509 | Photopolymer Printing Plate Precursor - A photopolymer printing plate precursor includes a photosensitive coating on a support, wherein the photosensitive coating includes a composition that is photopolymerizable upon absorption of light, and the composition includes at least one binder, a polymerizable compound, a sensitizer, and a photoinitiator. The binder is a copolymer that has a Tg of less than 70° C., and wherein 1 mol-% to 50 mol-% of the monomeric units of the copolymer are substituted by at least one acidic group, has a very high sensitivity and resistance of the exposed image portions against alkaline developers, when exposed with a laser, even if no pre-heat step is performed. | 12-18-2008 |
20080311524 | Method For Making Negative-Working Heat-Sensitive Lithographic Printing Plate Precursor - A method for making a negative-working heat-sensitive lithographic printing plate precursor includes the steps pf:
| 12-18-2008 |
20080311525 | Method of Making a Photopolymer Printing Plate - A method of making a lithographic printing plate includes the steps of: a) providing a lithographic printing plate precursor including (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on the support including a photopolymerizable layer, and, optionally, an intermediate layer between the photopolymerizable layer and the support, wherein the photopolymerizable layer includes a polymerizable compound and a polymerization initiator, b) image-wise exposing the coating in a plate setter, c) optionally, heating the precursor in a pre-heating 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, wherein the photopolymerizable layer further includes a polymer containing an acid group and a basic nitrogen-containing compound capable of neutralizing the acid group, or wherein the photopolymerizable layer further includes a polymer containing an acid group which is neutralized by a basic nitrogen-containing compound. | 12-18-2008 |
20090035695 | POSITIVE WORKING LITHOGRAPHIC PRINTING PLATES - A positive-working lithographic printing plate precursor is disclosed comprising on a grained and anodized aluminum support having a hydrophilic surface or which is provided with hydrophilic layer, a coating comprising:
| 02-05-2009 |
20090081583 | METHOD FOR MAKING A LITHOGRAPHIC PRINTING PLATE - A method for making a lithographic printing plate includes the steps of: (1) providing a heat-sensitive lithographic printing plate precursor including on a support having a hydrophilic surface or which is provided with a hydrophilic layer, a heat-sensitive coating, (2) image-wise exposing the precursor with IR-radiation or heat, and (3) developing the image-wise exposed precursor with an alkaline developing solution including a compound having at least two onium groups. According to the above method, a printing plate is formed with an improved developing latitude or an improved exposure latitude. | 03-26-2009 |
20090170028 | HEAT-SENSITIVE POSITIVE-WORKING LITHOGRAPHIC PRINTING PLATE PRECURSOR - A heat-sensitive positive-working lithographic printing plate precursor includes a support having a hydrophilic surface or which is provided with a hydrophilic layer, a heat-sensitive coating including an IR absorbing agent, a phenolic resins and a first polymer, wherein the first polymer is an alkaline soluble polymer including a monomeric unit having a structure according to Formula I or Formula II, wherein at least one of the aromatic groups Ar | 07-02-2009 |
20090233235 | METHOD OF MAKING A LITHOGRAPHIC PRINTING PLATE - A method of making a lithographic printing plate includes the steps of a) providing a lithographic printing plate precursor including (i) a support having a hydrophilic surface or which is provided with a hydrophilic layer, (ii) a coating on the support including a photopolymerizable layer, and, optionally, an intermediate layer between the photopolymerizable layer and the support, wherein the photopolymerizable layer includes a polymerizable compound, a polymerization initiator, and a reactive binder; b) image-wise exposing the coating in a plate setter; c) optionally, heating the precursor in a pre-heating 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, wherein the reactive binder is a polymer containing a monomeric unit which includes a group having an ethylenically unsaturated bond. | 09-17-2009 |
20100129755 | METHOD FOR MAKING A LITHOGRAPHIC PRINTER PLATE PRECURSOR - A method for making a lithographic printing plate precursor is disclosed comprising the steps of a. providing a lithographic printing plate precursor including a support having a hydrophilic surface or which is provided with a hydrophilic layer, a photopolymerizable coating comprising a photopolymerizable composition, and an overcoat layer comprising a water soluble low molecular weight acid, wherein said overcoat layer has a surface pH-value ranging between 1 to 6; b. image-wise exposing the precursor; c. optionally heating the exposed precursor; d. processing the obtained precursor by applying a gum solution and optionally brushing the precursor, and/or by mounting the precursor on a plate cylinder of a lithographic printing press and rotating the plate cylinder while feeding dampening liquid and/or ink to the coating. The printing plate obtained after imaging and processing in an off-press configuration with a gum solution or in an on-press configuration with fountain solution and ink shows an improved roll-up performance in the start-up of a printing process on a printing press. | 05-27-2010 |
20100129756 | GUM SOLUTION FOR DEVELOPING AND GUMMING A PHOTOPOLYMER PRINTING PLATE - A gum solution is provided which comprises a film-forming hydrophilic polymer or surfactant, and a salt formed by reaction of an acid, selected from phosphoric acid and phosphorous acid, with a di- or tri-alkanolamine. The gum solution is suitable for developing and gumming a lithographic photopolymer printing plate precursor. Also provided is a method for preparing a lithographic printing plate wherein this gum solution is used, and whereby printing plates are obtained which exhibit an improved clean-out performance. | 05-27-2010 |
20100151390 | METHOD OF MAKING A PHOTOPOLYMER PRINTING PLATE - A method for making a lithographic printing plate includes the steps of providing a printing plate precursor including a support and photosensitive coating wherein the photosensitive coating includes a photopolymerizable composition; image wise exposing the printing plate precursor on an external drum apparatus emitting one or more scanning laser beams having a wavelength between 390 nm and 420 nm and an energy density, measured on the surface of the precursor, of 100 μJ/cm | 06-17-2010 |
20100248150 | METHOD FOR PREPARING LITHOGRAPHIC PRINTING PLATE PRECURSORS - The method of preparing a lithographic printing plate precursor according to the present invention comprises the steps of: providing an aluminum support; graining and anodizing the aluminum support; without applying a hydrophilic layer on the anodized aluminum support, coating a composition which is photopolymerizable upon absorption of light having a wavelength in the range of from 350 nm to 450 nm and comprising a polymerizable monomer or oligomer, a binder and a photo-initiator on the grained and anodized aluminum support to form a photopolymerizable layer; coating an overcoat on the photopolymerizable layer; characterized in that the ratio of the total solid amount of polymerizable monomer and oligomer to the total solid amount of binder is from 1.0 to 2.0. | 09-30-2010 |
20110059401 | METHOD FOR PREPARING LITHOGRAPHIC PRINTING PLATES - A method of preparing a lithographic printing plate including the steps of providing a lithographic printing plate precursor including a photopolymerizable coating provided on a hydrophilic support;—image-wise exposing the precursor;—pre-heating the exposed precursor;—developing the exposed precursor in a gum solution; wherein after pre-heating and before developing the precursor an accelerated cooling of the precursor is carried out and the cooling does not essentially remove a part of the coating of the precursor. | 03-10-2011 |
20110143284 | METHOD AND APPARATUS FOR PREPARING LITHOGRAPHIC PRINTING PLATE PRECURSORS - A method of preparing a lithographic printing plate in which no pre-heat step is used comprising the steps of:—providing a lithographic printing plate precursor comprising a support and a photopolymerizable image-recording layer, the image-recording layer comprising a monomer and a binder;—image-wise exposing the precursor in an exposure unit;—off press developing the exposed precursor with an aqueous solution in a processing unit; characterized in that the ratio of the total amount of monomer to the total amount of binder is at least 1 and the time lapse between exposing an image-area of the precursor and contacting the image-area with the aqueous solution is at least 1 minute. | 06-16-2011 |