35results about How to "Excellent brush resistance" patented technology

A production method for a printing plate, especially a gravure plate with a cushioning property, which enables direct gravure printing on a hard printing matter without using a blanket roll by being provided with a cushioning property, effects a satisfactory gravure printing on a rough surface such as cardboard printing, and is suitable for color-printing a matrix image for forming a color filter on a liquid crystal panel-use glass sheet or an image on a compact disk or the like. The gravure plate comprises a hollow roll provided on the surface thereof with a cushioning layer consisting of rubber or cushioning resin, a copper plated layer provided on the surface of the cushioning layer and formed on the surface thereof with many gravure cells, a metal layer provided on the surface of the copper plated layer, a metal carbide layer provided on the surface of the metal layer, and a diamond-like carbon coating for coating the surface of the metal carbide layer.

A photosensitive lithographic printing plate material developable with water characterized by comprising: a substrate; a hydrophilic layer formed on the substrate and comprising a water-soluble polymer, a crosslinking agent for crosslinking the water-soluble polymer, and colloidal silica, the mass ratio of the water-soluble polymer to the colloidal silica being from 1:1 to 1:3; and a photocurable photosensitive layer formed on the hydrophilic layer and comprising a polymer having sulfo and vinylphenyl groups in side chains, the vinylphenyl group being bonded to the main chain through a connecting member comprising a heterocycle, a photopolymerization initiator, and a compound for sensitizing the initiator. The photosensitive lithographic printing plate material is a photosensitive lithographic printing plate having high sensitivity and usable in a CTP system. It can be developed with water, can be developed even on a printing machine, and has excellent suitability for printing.

The purpose of the present invention is to provide a support for a lithographic printing plate. The support has excellent scratch resistance and with the support, an original lithographic printing plate that has excellent printing durability when used as a lithographic printing plate and exhibits excellent on-machine developability can be obtained. For this support for a lithographic printing plate, which is provided with an aluminum plate and an anodized aluminum film thereon and which has micropores in the anodized film that extend in the depth direction from the surface that is on the opposite side from the aluminum plate: the micropores are configured from a large diameter hole section that extends from the surface of the anodized film to a mean depth of 75 - 120 nm (depth (A)) and a small diameter hole section that connects with the bottom of the large diameter hole section and extends from the connection position to a mean depth of 900-2000 nm; the mean diameter at the anodized film surface of the large diameter hole section is 10 nm to less than 30 nm, and the mean diameter and the depth (A) satisfy the relationship (depth (A) / mean diameter) = greater than 4.0 to 12.0; and the mean diameter at the connection position of the small diameter pore section is greater than 0 and less than 10 nm.

Provided are: a lithographic printing plate exhibiting excellent plate durability, chemical resistance, scratch resistance and impression properties while maintaining dirt resistance; and a method for producing the lithographic printing plate. A lithographic printing plate original having a support body and a photosensitive layer on the support body, wherein the photosensitive layer contains: (A) a polymerizable compound; (B) a polymerization initiator; (C) a polyvinyl acetal resin having one or more hydroxyl groups; (D) a cross-linking agent capable of cross-linking by reacting with a hydroxyl group and / or an acid group in the polyvinyl acetal; and (E) a (meth)acrylic resin.

The present invention provides a novel gravure printing roll which includes a surface reinforcing coating layer having no toxicity and no possibility of causing pollution, and which has excellent printing resistance, and a manufacturing method thereof. The gravure printing roll includes: a plate base material; a copper plating layer formed on a surface of the plate base material and having multiple gravure cells formed thereon; and a silicon dioxide film which covers a surface of the copper plating layer, in which the silicon dioxide film is formed by using a perhydropolysilazane solution. The copper plating layer has a thickness of from 50 to 200 µm, the gravure cell has a depth of from 5 to 150 µm, and the silicon dioxide film has a thickness of from 0.1 to 5 µm, preferably 0.1 to 3 µm, and more preferably 0.1 to 1 µm.

There are provided a resin composition for laser engraving that can give a relief printing plate having excellent hardness, film elasticity, printing durability, and aqueous ink transfer properties and that has excellent rinsing properties for engraving residue generated when laser-engraving a printing plate and excellent engraving sensitivity in laser engraving, a relief printing plate precursor employing the resin composition for laser engraving, a process for producing a relief printing plate employing the same, and a relief printing plate obtained thereby.

A photosensitive resin composition for flexographic printing, which contains at least (A) hydrophilic copolymer, (B) elastomer, (C) polymerizable unsaturated monomer and (D) photopolymerization initiating material, in the resin In the cross section of the cured product of the composition, the phase area S including the hydrophilic copolymer (A) A 15% or more and 60% or less, in the phase containing the hydrophilic copolymer (A), the phase area is 3 μm 2 Above and below 100μm 2 The ratio of the phase occupied is 20 (area %) or more.