Fujifilm Corporation

Sumitomo Light Metal Industries, Ltd.

Shinya Kurokawa

Hirokazu Sawada

Yoshiharu Tagawa

Akio Uesugi

Atsuo Nishino

Yuya Miyagawa

Atsushi Matsuura

Yusuke Namba

Keio Okano

Takanori Mori

Hiroshi Ougi

Masanori Tsunekawa

Kazuaki Hatano

Koushi Nagae

A lithographic printing plate support of the invention includes an aluminum plate and an anodized aluminum film which has micropores extending from a surface of the anodized film opposite from the aluminum plate in a depth direction of the anodized film; the micropores each have a large-diameter portion extending from the anodized film surface to an average depth (depth A) of 75 to 120 nm and a small-diameter portion which communicates with the bottom of the large-diameter portion; the average diameter of the large-diameter portion at the anodized film surface is at least 10 nm but less than 30 nm; 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 an average diameter of the small-diameter portion at the communication level is more than 0 but less than 10 nm.

Support for lithographic printing plate and manufacturing method therefor, as well as original lithographic printing plate

A lithographic printing plate support includes an aluminum plate and an anodized film formed at a surface of the aluminum plate and having micropores which extend in a depth direction of the anodized aluminum film from a surface of the anodized film opposite from the aluminum plate. Each of the micropores includes a large-diameter portion and a dendritic small-diameter portion. The lithographic printing plate support has excellent scratch resistance and is capable of obtaining a presensitized plate which exhibits excellent on-press developability and enables a lithographic printing plate formed therefrom to have a long press life and excellent deinking ability after suspended printing.

Lithographic printing plate support and presensitized plate

An aluminum sheet material for lithographic printing plates wherein the number of aluminum carbide particles having a circle equivalent diameter, measured by the PoDFA method, of 3 &#x3bc;m or more is four or less, the number of aluminum carbide particles having a circle equivalent diameter, measured by the PoDFA method, of 3 &#x3bc;m or more.

Aluminum sheet material for lithographic printing plates

The lithographic printing plate support includes an aluminum plate and an anodized film formed on the aluminum plate and micropores extend in the anodized film in a depth direction from its surface opposite from the aluminum plate. Each of the micropores includes a large-diameter portion having a predetermined shape and a small-diameter portion having a predetermined shape. The lithographic printing plate support has excellent scratch resistance and is capable of obtaining a presensitized plate which exhibits excellent on-press developability and enables a lithographic printing plate formed therefrom to have a long press life, and excellent deinking ability in continued printing and after suspended printing.

Provided is a lithographic printing plate support that has excellent scratch resistance and is capable of obtaining a presensitized plate which exhibits excellent on-press developability and enables a lithographic printing plate formed therefrom to have a long press life and excellent deinking ability after suspended printing. The lithographic printing plate support includes an aluminum plate, and an aluminum anodized film formed thereon and having micropores which extend in a depth direction of the anodized film from a surface of the anodized film opposite from the aluminum plate. Each micropore has a large-diameter portion which extends to a depth of 5 to 60 nm (depth A) from the anodized film surface, and a small-diameter portion which communicates with the bottom of the large-diameter portion, further extends to a depth of 900 to 2,000 nm from the communication position and has a predetermined average diameter.

Support for planographic printing plate, method for producing support for planographic printing plate, and planographic printing original plate

A presensitized plate bringing about the lithographic printing plate which exhibits a high resistance to scumming and in which formation of bulges causing image dropouts is suppressed is provided with the lithographic printing plate support which includes an aluminum plate and an anodized film of aluminum provided on the aluminum plate, and has a micropore extending in the anodized film in the direction of depth from a film surface opposite with a film surface facing the aluminum plate. The micropore is sealed at least partially on its inside with protrusions made of boehmite, and the protrusions made of boehmite which are located on the anodized film have a mean height of less than 15 nm.

Growing community of inventors

Haibara-gun, Japan

Shinya Kurokawa