摘要:
PROBLEM TO BE SOLVED: To provide a lithographic printing plate support that has excellent scratch resistance and can obtain an original plate for a lithographic printing plate, which has excellent printing durability when made into a lithographic printing plate, exhibits excellent on-board developability, and prevents the generation of spot-like stains even if stored for a long period of time, and to provide a method for manufacturing the same.SOLUTION: A lithographic printing plate support is provided with an aluminum plate, and an aluminum anodized film on the aluminum plate. The anodized film internally has micropores that extend in the depth direction from the surface on the side opposite to the aluminum plate. The micropore is composed of a large diameter pore portion having a specific shape, and a small diameter pore portion communicating with the bottom of the large diameter pore portion and having a specific shape. At least a portion of the inside of the small diameter pore portion is sealed by protrusions made of boehmite. The ratio of the mean height of the protrusions, made of boehmite, on the inside of the large diameter pore portion with respect to the mean diameter on the anodized film surface of the large diameter pore portion is less than or equal to a predetermined value.
摘要:
PROBLEM TO BE SOLVED: To provide a lithographic printing plate support having, as a lithographic printing plate, superior scratch resistance and being capable of obtaining a presensitized plate that has superior ink removing ability after supended printing, deinking ability, plate wear, and exhibits superior on-press developability, and to provide a method for manufacturing the lithographic printing plate support and the presensitized plate.SOLUTION: The lithographic printing plate support includes an aluminum plate and an anodized film formed on the aluminum plate and micropores extending in the anodized film in a depth direction from its surface opposite from the aluminum plate. Each of the micropores includes a large-diameter part having a predetermined shape and a small-diameter part having a predetermined shape.
摘要:
PROBLEM TO BE SOLVED: To provide a lithographic printing plate support having excellent scratch resistance, and thereby to provide an original lithographic printing plate which enables a lithographic printing plate formed therefrom to have a long press life and excellent deinking capability when left to stand, and which exhibits excellent on-press developability. SOLUTION: The lithographic printing plate support has an aluminum plate 12 and an anodized aluminum film 14 having micropores 16 which extend in its depth direction from the opposite surface of the aluminum plate 12. Each of the micropores 16 has a large-diameter portion 18 which extends to a depth A of 5 to 60 nm from the surface of the anodized film, has a predetermined mean diameter and a small-diameter portion 20 which communicates with a bottom of the large-diameter portion 18 and extends to a depth of 900 to 2,000 nm from a communication position and has a predetermined mean diameter. COPYRIGHT: (C)2011,JPO&INPIT