Patent ID: 9259954
Filing Date: 2016-02-16
CPC Classification: B41N,C25D,C25F

Claim Text:
1. A lithographic printing plate support, comprising an aluminum plate and an anodized film of aluminum which is formed on the aluminum plate and has micropores extending therein from a surface of the anodized film opposite from the aluminum plate in a depth direction of the anodized film, wherein each of the micropores has a large-diameter portion which extends from the surface of the anodized film to an average depth (depth A) of 75 to 120 nm and a small-diameter portion which communicates with a bottom of the large-diameter portion and extends to an average depth of 900 to 2,000 nm from a level of communication with the large-diameter portion, wherein an average diameter of the large-diameter portion at the surface of the anodized film is at least 10 nm but less than 30 nm and a ratio of the depth A to the average diameter (depth A/average diameter) of the large-diameter portion is more than 4.0 but up to 12.0, and wherein an average diameter of the small-diameter portion at the level of communication is more than 0 but less than 10.0 nm.