Abstract:
A printing plate material including: a plastic support; a hydrophilic layer on the plastic support; and a back layer on the plastic support, being provided on the opposite side to the hydrophilic layer, wherein the back layer includes a matting agent, and a distribution width of a projection amount of the matting agent is 1 to 20%.
Abstract:
The infrared-ray photosensitive planographic printing plate precursor of the present invention comprises a support, a recording layer provided on one side of the support, and a back coating layer provided on a side opposite to a side having the recording layer of the support, and the recording layer contains (a) a long chain alkyl group-containing polymer containing a vinyl monomer having a carboxyl group at a composition ratio within a range from 20 to 99 mol %, and (b) an infrared absorbing agent, and can form an image by infrared-ray irradiation. According to this planographic printing plate precursor, even when the precursor is packaged and transported without using a protective paper (interleaving paper) between plate materials, a recording layer is hardly scratched.
Abstract:
Disclosed is a printing plate material in roll form of the on-press development type comprising a support, a functional layer including a hydrophilic layer and a thermosensitive image formation layer provided on one side of the support, and a back coat layer provided on the other side of the support, the functional layer containing first matting agents and having first protrusions formed from the first matting agents, and the back coat layer containing second matting agents and having second protrusions formed from the second matting agents, wherein an average protrusion height of the first protrusions is 0.5 to 5.0 μm higher than that of the second protrusions.
Abstract:
A lithographic printing plate precursor capable of forming an image without alkali development, comprising a hydrophilic support and a laser-sensitive photopolymerizable layer, wherein the photopolymerizable layer or other layer included in the lithographic printing plate precursor contains a copolymer containing at least a repeating unit having at least one ethylenically unsaturated bond and a repeating unit having at least two functional groups capable of interacting with a surface of the support or a copolymer containing at least a repeating unit having at least two ethylenically unsaturated bonds and a repeating unit having at least one functional group capable of interacting with a surface of the support.
Abstract:
The present invention provides a polymerizable composition comprising (A) a compound including a polymerizable unsaturated group and (B) a macromolecular compound including, at a side chain thereof, a structure represented by the following general formula (I). The present invention also provides a negative type planographic printing plate precursor responsive to an infrared laser, the precursor being superior in recording sensitivity and printing durability and using the polymerizable compound as a recording layer.General Formula (I) Z−M+ wherein Z− represents COCOO−, COO−, SO3− or SO2—N−—R where R represents a monovalent organic group and M30 represents an onium cation.
Abstract:
A lithographic printing method comprising: (i) a process of one of (i-1) imagewise exposing a lithographic printing plate precursor comprising a support and an image-recording layer capable of being removed with at least one of a fountain solution and a printing ink, and mounting the exposed printing plate precursor on a plate cylinder of a printing press; and (i-2) mounting the lithographic printing plate precursor on a plate cylinder of a printing press and imagewise exposing the lithographic printing plate precursor; (ii) a process of removing an unexposed area of the image-recording layer by directly supplying a fountain solution on the exposed lithographic printing plate precursor with a water application roller of the printing press; and (iii) a process of printing, wherein the printing press comprises a water supply apparatus including a water application roller and at least one roller in contact with the water application roller, at least one of said at least one roller being an oscillating roller.
Abstract:
Disclosed is a printing method comprising the steps of mounting an underlay sheet on a plate cylinder of a printing press, and providing, on the underlay sheet, a printing plate material comprising a plastic sheet support, and provided thereon, a hydrophilic layer, an image formation layer and a backing layer, the backing layer being provided on the side of the support opposite the image formation layer, so that the backing layer side surface of the printing plate material contacts the underlay sheet surface, wherein a coefficient of dynamic friction of the backing layer side surface of the printing plate material to the underlay sheet surface is from 0.1 to 0.5.
Abstract:
A method for producing a lithographic printing plate is provided, wherein, in the non-alkaline development of a lithographic printing plate precursor having a protective layer, even if the protective layer components are mingled into the developer, the reduction in development removability of the image recording layer and the generation of development scum can be inhibited; an on-press development type lithographic printing plate precursor with excellent inking property, high scratch resistance, satisfied on-press developability and good fine line reproducibility is provided; and a lithographic printing method is provided, each of which is a method for producing a lithographic printing plate, comprising: imagewise exposing a lithographic printing plate precursor comprising a support, an image recording layer and a protective layer, and rubbing the plate surface by a rubbing member of an automatic processor in the presence of a developer at a pH of 2 to 10 to remove the protective layer and the image recording layer in the unexposed area; a lithographic printing plate precursor comprising a support, an image recording layer removable with a printing ink and/or a fountain solution, and a protective layer containing a polyvinyl alcohol having a carboxyl group and/or a sulfonic acid group within the molecule; and a lithographic printing method comprising on-press development.
Abstract:
A color image-forming material capable of drawing an image by infrared laser exposure and excellent in image visibility, storage stability and white light stability, and an on-press development or non-processing (non-development) type lithographic printing plate precursor ensuring high sensitivity and high press life and being excellent in image visibility, on-press developability and the like, are provided, which are a color image-forming material comprising an image recording layer capable of drawing an image by infrared laser exposure, the color image-forming material forming a color image without passing through a development processing step after image recording, wherein the image recording layer comprises (A) an infrared absorbent, (B) a cyclic color-forming compound having a cyclic structure within the molecule and forming a dye by a ring opening, and (C) a dye stabilizer which is a compound interacting with the cyclic color-forming compound to stabilize the ring-opened dye body and cause color formation and which is released from the interaction upon laser exposure to decrease in the color formation; and a lithographic printing plate precursor using this color image-forming material.
Abstract:
Disclosed is a planographic printing plate material comprising a plastic support and provided thereon, a subbing layer containing a water-soluble resin, a hydrophilic layer containing metal oxide particles with an average particle diameter of from 3 to 100 nm, and an image formation layer containing heat melting particles or heat fusible particles in that order, the planographic printing plate material being in the form of roll, wherein a dry coating amount of the water-soluble resin in the subbing layer is in the range of from 0.001 g/m2 to 3.0 g/m2.
Abstract translation:公开了一种平版印刷版材料,其包含塑料支撑体,其上设有含有水溶性树脂的底层,含有平均粒径为3〜100nm的金属氧化物颗粒的亲水层,以及含有 平版印刷版材料为辊状,其中,底涂层中的水溶性树脂的干涂布量在0.001g / m 2以下的范围内 > 2℃至3.0g / m 2。